Which sentence below is a compound-complex sentence? a. My friend and I went to the beach today. c. My friend and I went to the beach today, so we went surfing in the ocean b. My friend and I went to the beach today, but we were not able to go surfing because it started to rain. d. Although my friend and I went to the beach today, we were not able to go surfing. Please select the best answer from the choices provided A B C D