Question

Which sentence has a pronoun with an unclear, missing, or confusing antecedent?

Answer 1

That sentence would be (c) This diner is great because they always seat people quickly.
Who is they? They is typically used to refer to a group of people, however the only noun before it is the diner. While most automatically assume "they" refers to the servers, it is not explicitly stated in the sentence, which could be confusing.