Which sentence correctly uses the word "so"?

What does the line most likely show about the setting of the scene?

What is the best way to revise sentence number (12)

To choose a good persuasive essay topic,begin with a big idea,narrow it down,and a.then narrow it down more; it is impossible to have a topic that is too narrow. b.do some research to see what you should write about c.specify-ask a question you want answered in your argument