Which sentence below has a missing antecedent?

A Many people are planning to attend the race, so we should get to the park early.
B My parents are both swimmers, so I know a lot about it.
C When Steven and Patrick went to the movies, he bought the tickets.

Is it B??

All three have pronoun/antecedent problems, that's for sure.

A. This one is probably the most clear. It's not too difficult to guess who "we" are.

B. True, there is no antecedent for the pronoun "it."

C. It's not clear who "he" is, since two different males are named earlier in the sentence.

It's B. I just took the test and got a 100%. :D

B is the correct answer.

Yes, you are correct! Sentence B, "My parents are both swimmers, so I know a lot about it," has a missing antecedent.

To identify the missing antecedent, we need to look for a pronoun that does not have a clear noun or noun phrase it is referring to. In this case, the pronoun "it" in sentence B does not have a clear antecedent.

To clarify the sentence, we can add an antecedent. For example: "My parents are both swimmers, so I know a lot about swimming." Now, the pronoun "it" has a clear antecedent - "swimming."