Answer: On question 4, the answer is alternative B. On question 5, the answer is alternative C.
Explanation: On paragraph 4, we can see that there are some exceptions to the program, so if the company is categorized in one of those situations, such as political organizations, charities, telephone surveyors and companies with whom you have an existing business relationship, they are still able to reach you in your phone number even if you registered. This way, we can understand why is alternative B the correct answer to question 4.
The purpose of writing such an article is to inform people of this existing program in order for them to stop receiving telemarketing calls if they decide to register their telephone number. Then, it presents many different ways in which the population may register, such as the internet of from direct phone calls. The article, however, doesn't only give instructions on how to avoid these calls, but also talks about the program itself and why does it exist. Your answer to question 5, then, is alternative C.