This expert is from the us constitution

Which of the following sentences is grammatically correct?

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

Which of the following best describes how the recall refenderum and initiative provisions give power to voters