Can someone help me thank you.

Which of the following is a complex sentence? a. after henry submitted his essay, he realized that he hadn't proofread the last page. b. identity theft is a growing problem, especially among seniors. c. we didn't have enough potatoes for dinner, so we served rice instead. d. jim tried to watch a video on a device connected to a crowded wireless network; as a result, the video stuttered and froze.

Which is it? the desert is than the mountains? 1. drier 2. more dry

Based on this excerpt the authors are most likely to attempt to answer which question