W: i heard that only 20% of summer jobs in this part of the country are advertised. the other 80% are filled some other way.
M: relaly? then maybe i need to change my job search techniques.
Q: what can be inferred about the man?
(A) he has been applying only for advertised jobs.
(B) he's conviced that there's a shortage of jobs.
(C) he doesn't have time to read all the jobs ads.
(D) he'll help the woman find a job.
答案是B,為什麼不是A?