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An academic institution that has granted tenure to one of its employees will be prevented from terminating his or her employment lacking some just cause.
This answer choice is grammatically incorrect and illogical. First, the article some can describe only plural count nouns or non-count nouns whereas the noun cause is a a singular count noun.
What helps us identify this mistake is the following Stop Sign:
some, much, (a) little, less, the amount of
Next, lacking some just cause is illogically placed after the noun employment but it should appear after an academic institution, because it's the institution, not the employment, who is lacking (missing) a just cause.
While this answer choice corrects the original Parts of Speech mistake, it is grammatically incorrect. The plural pronoun their is used to refer to one of its employees, which is a singular noun phrase.
Furthermore, the phrase prevented at is non-idiomatic. The verb prevent is used with the preposition from, and the correct idiom is prevent A from doing B, or in the passive voice: A is/was prevented from doing B.
While this answer choice corrects the original illogical modifier placement and Parts of Speech mistake, it is grammatically incorrect and stylistically inferior.
The pronoun it is incorrectly used to refers to a previously mentioned verb (terminating). To refer to a previously mentioned verb, the phrase to do so or doing so should be used.
What helps us identify this question as a Pronoun question is the following Stop Sign:
Any pronoun in the underlined part or after it.
In addition, this answer choice is stylistically flawed. The phrase should there be no just cause for it is awkward and wordy.
This answer choice changes the meaning of the original sentence. By using the active voice for the verb prevent, this answer choice indicates something or someone other than the academic institution is prevented from terminating employment. However, in the original sentence it is the academic institution that is prevented from doing so.
In addition, the phrase if there is a lack of just cause to do so is wordy and redundant.
This answer choice corrects the original mistakes by changing the modifying phrase lacking some just cause with the more concise phrase without just cause.[[snippet]]