Singular-plural

Hi ! I have a question here and I need your help.

Every student in those five rooms must bring .......................... own book to class.

A. one’s

B. his

C. her

D. someone’s

I choose B. Is it the best choice?
Thanks for helping.

Quote:

---

Originally Posted by tranlam1609

Hi ! I have a question here and I need your help.

Every student in those five rooms must bring .......................... own book to class.

A. one’s

B. his

C. her

D. someone’s

I choose B. Is it the best choice.
Thanks for helping.

---

Both B and C are possible. If there are both male and female students, use "their".