Which sentence shows pronoun consistency after the phrase 'each student'?

Which sentence shows pronoun consistency after the phrase 'each student'?

• A. Each student must turn in their assignment.
• B. Each student must turn in their assignment's.
• C. Each student must turn in his assignment.
• D. Each student must turn in one's assignment.

Answer: (C)

The sentence tests pronoun agreement with a singular antecedent. “Each student” is singular, so the pronoun that refers back to it should also be singular. Using “his” keeps the reference clear and direct: each individual student has one assignment, so the sentence correctly points to that student with a singular masculine pronoun.

Using a plural pronoun like “their” would mismatch the singular subject, even though many speakers use singular “they” in casual writing today. The possessive form “assignment’s” isn’t a pronoun at all, so it doesn’t substitute for the object of the verb. And while “one’s” is technically singular, it sounds awkward and less natural after “each student,” making the sentence feel less clear.

So, the singular pronoun that cleanly echoes the single student is the best choice.