The officers of the ship ... went striding up and down the decks shouting orders and directions and driving the immigrants before them. Scowling and gesturing, they pushed and pulled the passengers, herding us into separate groups as though we were animals. Which best paraphrases the central idea of the excerpt?

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.