Which of the following sentences uses correct pronoun-antecedent agreement?

Question

A.  Everyone at the party wore their costume.
B.  To keep the birds from eating seeds, soak it in blue food coloring.
C.  Not one of the girls was tired after their speech.
D.  The company is improving its service.

 A. 

Everyone at the party wore their costume.

 B. 

To keep the birds from eating seeds, soak it in blue food coloring.

 C. 

Not one of the girls was tired after their speech.

 D. 

The company is improving its service.

Answer 1

Definitely "D"

I don't mind quizzing myself once in a while as a review but not giving the student an answer to a quiz question. hmmm