What does the subject of a sentence indicate

"a wedding gift," the narrator's tone is select all that apply. caring omniscient serious objective

Read the excerpt from "how i learned english.” and that was important, as important as joe barone asking me how i was through his tears, picking me up and dusting me off with hands like swatters, what does the imagery in the excerpt best readers picture? the awful stinging sensation of being dusted off the quick slapping motion of joe’s hands how roughly the speaker is pulled off the ground how loud and hard joe is laughing

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.