Which statement is an example of a complex sentence? A. Cora secretly pursued her career in law enforcement. B. After Maria finished dinner, she washed the dishes in the sink. C. I'm trying to learn Spanish, and my friend's trying to learn French. D. Paolo missed his girlfriend, but he knew she'd be back soon.

A complex sentence contains a subordinate clause (or a sentence starting with a conjuction) So the answer is B ... After Maria finished dinner, she washed the dishes in the sink. Because of the subordinate clause (Afer Maria finished dinner) The others are simple sentences. (A. simple sentence and C-D are compound sentences)