Which sentence is a complex sentence? \( \begin{array}{l}\text { OA) Antony checked out one book from the library. } \\ \text { OB) Tim scored two points, and Alex scored three. } \\ \text { OC) When Suzi grows up, she wants to be a doctor. } \\ \text { OD) Tina wanted chocolate, but Max wanted strawberry. }\end{array} \)

To identify a complex sentence, we need to look for a sentence that contains at least one independent clause and at least one dependent clause. Let's analyze each option: - **OA)** "Antony checked out one book from the library." - This is a simple sentence with one independent clause. - **OB)** "Tim scored two points, and Alex scored three." - This is a compound sentence with two independent clauses. - **OC)** "When Suzi grows up, she wants to be a doctor." - This sentence has one independent clause ("she wants to be a doctor") and one dependent clause ("When Suzi grows up"). Therefore, it is a complex sentence. - **OD)** "Tina wanted chocolate, but Max wanted strawberry." - This is another compound sentence with two independent clauses. Based on this analysis, the complex sentence is: **OC) When Suzi grows up, she wants to be a doctor.**