In which sentence are the pronoun and antecedent not in agreement?

The bear licked its muddy paws.
Anita swam to the surface to catch her breath.
If the bus is late, he will be late to class.
Gretchen and Paula did not know when they would see each other again.

Question

In which sentence are the pronoun and antecedent not in agreement?
 	
	The bear licked its muddy paws.
	Anita swam to the surface to catch her breath.
	If the bus is late, he will be late to class.
	Gretchen and Paula did not know when they would see each other again.

study_together · Answer

It's C because it uses the word "if" to complete the sentence and antecedent is an event that happened time ago.