NEED HELP DUE TODAY PLZ HELP ME I AM STUCK PLZ PLZ PLZ HELP ME!!!!

It’s not clear who the underlined pronoun in this sentence is referring to. Which choice makes the sentence clear?

Ms. Evans asked Shira if she understood her assignment.

Choose 1 answer:

(Choice A)
A
Ms. Evans's

(Choice B)
B
the woman's

(Choice C)
C
one's