942 - Logical Reasoning

Question : Banning cigarette advertisements in the mass media will not reduce the number of young people who smoke. They know that cigarettes exist and they know how to get them. They do not need the advertisements to supply that information.
The above argument would be most weakened if which of the following were true?

1. Seeing or hearing an advertisement for a product tends to increase people's desire for that product.
2. Banning cigarette advertisements in the mass media will cause an increase in advertisements in places where cigarettes are sold.
3. Advertisements in the mass media have been an exceedingly large part of the expenditures of the tobacco companies.
4. Those who oppose cigarette use have advertised against it in the mass media ever since cigarettes were found to be harmful.
5. Older people tend to be less influenced by mass-media advertisements than younger people tend to be.