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Sentence Correction: Parts of Speech - Adjective

The corporation has confirmed with its subsidiary that out of the entire volume of market study carried out in the parent-company's name, the foreign markets analysis remains confidential.

Incorrect.

This answer choice is grammatically incorrect. The singular subject analysis does not agree with the plural verb remain.

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Incorrect.

While this answer choice corrects the original Subject Verb Agreement mistake, it drastically changes the original meaning by changing the singular subject  (analysis) into a plural subject: the foreign markets and analysis. While grammatically correct, the corrected sentence is illogical. To say that foreign markets and analysis remain confidential makes no sense in the context of the sentence - for one, a foreign market is not something that can logically remain confidential.

This answer choice is grammatically incorrect. The singular subject analysis does not agree with the plural verb remain.

[[snippet]]

Incorrect.

This answer choice is grammatically incorrect. The singular subject analysis does not agree with the plural verb remain.

[[snippet]]

Excellent!

This answer choice is grammatically correct. The singular subject analysis correctly agrees with the singular verb remains.

[[snippet]]

Happy to explain: foreign markets is not the subject itself, but it is part of the subject phrase foreign markets analysis. The noun analysis is the kernel of this subject phrase.

Note that analysis is described by the brief noun phrase foreign markets. In other words the plural noun foreign markets functions as an adjective, modifying (=describing) analysis.

In English a noun can sometimes behave like an adjective. When noun A (foreign markets) appears before noun B (analysis), as in our example above, the function of A is to describe B, or in other words to answer the question, "What type of B?"

In this case, the noun phrase "foreign markets" answers the question: What kind of analysis? Answer: A foreign markets analysis.

Sure:

Think of the following noun phrases: an intelligence analysis; a news report.

These phrases place two nouns side by side. In the first phrase "intelligence" functions as an adjective of analysis and tells us, "what kind of analysis?"  Answer: an analysis made by an intelligence agency.

In the second phrase, "news" functions as an adjective and tells us "What kind of report?" Answer: a news report - a report with news in it.

Well done.
Okay. Let's move on.
entire volume of market study carried out in the parent-company's name, the foreign markets analysis remains
whole volume of the market study carried out in the parent-company's name, the foreign markets analysis remain
entirety of the market study carried out in the parent-company's name, the foreign markets analysis remain
complete volume of market study carried out in the parent-company's name, the foreign markets and analysis remain
entire volume of market study carried out in the parent-company's name, only the foreign markets analysis remain
Can you explain what the words 'foreign markets' are doing in this sentence? Isn't 'foreign markets' the subject?
I recognized "analysis" as the subject - I'm ready to move on.
Remind me - How can a noun be an adjective?
Gotcha.
Okay - can you give me another example?