What Is Meant by Survey in the SQ3R

What is meant by Survey in the SQ3R?

A) To survey,you must look through the outline,objectives,questions,and any other material the author has deemed important. Surveying does not require in depth analysis yet it must include the entire chapter.
B) To survey,you must read the chapter summary and try to memorize it. You do not read the chapter or any part of it prior to surveying.Reading comes later.
C) To survey,you must read the chapter first then look through the outline and objectives
D) To survey,you must think of a question then look through the material to find the answer.