Which of the following techniques is key in the process of close reading?

scanning

annotating

prereading

prewriting

The question is asking us the following: Which of the following techniques is key in the process of close reading? Close reading means that we read something very attentively, paying a lot of attention to it. Ideally, we should also underline important parts and make annotations - so the correct answer is indeed "annotating" - making notes and comments on the text. Scanning would be rather useful when we don't need to read the text closely, but only get a rough idea of it.