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Analytical Writing Assessment: Writing Guidelines - Punctuation and Capitalization

Which of the following punctuation marks should you try to refrain from using when writing an essay?

Correct! 

Incorrect. Commas are essential in every essay. You should use them each time you start a sentence in something other than its subject, each time you compose a list, and many a time when you separate two sentences that are connected by a connector.

Questions, on the other hand, can and should be avoided in the GMAT.

The correct answer is question mark.

Commas are essential in every essay. You should use them each time you start a sentence in something other than its subject, each time you compose a list, and many a time when you separate two sentences that are connected by a connector.

Questions, on the other hand, can and should be avoided in the GMAT.

comma (,)
question mark (?)

I don't know