A、Online shopping has more disadvantages. B、It is a waste of money to shop online. C、Information on some websites isn’t reliable

W: Prof. Williams didn’t tell me that his lecture was postponed. I went to the classroom only to find some students were preparing for the exam.
M: Actually, if you had been careful enough to have a glance at the bulletin, you would have known all the information.
Q: What does the man mean?

W: Shopping online is really a completely new experience.
M: Yeah. But on the other hand, you know, you can’t see the exact things that may not be fitting, and thus money is wasted.
Q: What does the man mean?