The question is about the efficiency of finding job openings before search engines. The correct answer is [B] because the passage mentions that finding openings was inefficient and time-consuming before the advent of search engines. Option [A] is the opposite of the truth according to the passage. Option [C] is incorrect because the passage does not discuss the number of job matches before search engines. Option [D] is false as the passage does not suggest exclusivity in job site access.