A、The users’ comment on medicine is not always reliable. B、Ads of over-the-counter products are not allowed. C、The claim of any

M: Right, I guess you’ve got some ideas for our product promotion.
W: Well, first we must win over the medical circle, [1-1] so I think we should launch a campaign in all the specialist medical journals to promote our drugs, antibiotics and so on.
M: [1-2] Yes, that’s a good idea.
W: Then TV commercials.
M: Just a moment, are you sure we’re allowed to advertise medicines on TV?
W: Oh, yes, provided they are not drugs which need a prescription. We can advertise over-the-counter products. We can get users of our products to recommend them—“Their lotion cured my disease in six days.” for example.
M: Now, hold on. [2] It is forbidden to claim any positive cure for a disease. And we mustn’t offer any drugs for illness which should be treated by a doctor.
W: Mmm. OK. What about this—a series of full page newspaper ads with the message that most doctors consider our products the best.
M: That depends on whether it’s true. We can only refer to doctor’s preferences if our claim is supported by facts and figures.
W: Sure it is. But here is another suggestion. We could offer to return the purchase price to anyone who’s not satisfied with one of our products. It’s possible to do that, isn’t it?
M: No, I’m afraid not. [3] Manufacturers of medical products are not allowed to promise a return of price in their ads.
W: Well, it looks as though I’ll have to come up with something else. [4] I never realize the regulations are so rigid.
Questions 1 to 4 are based on the conversation you have just heard.   
1.What can be accepted for the promotion of medicine?
2.Why can’t the speakers get users of their products to support their claim in ads?
3.Why can’t the speakers promise to refund money to customers in their ads?
4.What can we learn about the woman from the conversation?