Can You Manage this SC Question? — GMAT Question of the Day

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Can You Manage this SC Question? — GMAT Question of the Day

GMAT Question of the Day: Sentence Correction
Explanation
A - Incorrect: Productive is an adjective, but it is being used to modify the verb operate, so it should be an adverb, productively.

C - Incorrect: Subject-verb agreement error: The relative pronoun that begins a new clause; the subject of the verb operates is managers, not study. The plural subject managers does not agree with the singular verb operates.

D - Incorrect: This answer choice changes the meaning of the sentence as the sentence is now about what makes managers productive and not what makes managers most productive.

E - Incorrect: The present progressive tense having is incorrect because the verb have is used to indicate a state or condition, so it cannot be in a progressive tense.

B - Correct: This answer choice correctly uses productively to modify the verb operate and uses the simple present tense have to indicate a condition or state.