Advertising follows us everywhere. Whenever we turn on the television, listen to the radio

or open a newspaper or a magazine, we are bombarded with advertisements. They invite us to try a new type of orange juice, wear X-brand jeans or watch the latest film. They beg us to notice the difference and discover the advantages. They exist to make us want what they are selling.

Strangely, the more we are exposed to advertising, the less we notice it. We get so used to seeing advertisements everywhere that they become largely invisible, as if they were another part of our everyday lives. But does that mean that we are no longer affected by them？

One advertising expert believes that the special power of advertising lies in the fact that we do not pay much attention to it. Dr. Krugman, who was head of research for a major advertising company for many years, says that the less we notice ads, the more we are affected by them. Dr. Krugman believes that when we stop noticing advertisements, we lower our defenses, allowing the messages of the advertisements to be taken in and stored, ready to be triggered into action at the right moment. He says that the effects of advertising on the individual are small, but over a period of time they have a powerful effect on the masses.

A market analyst says that all advertising, no matter how innocent, is misleading in some way.

When asked about the power of advertising in research surveys, most people agree that it works, but not on them. Almost everyone believes that they have complete control over how thousands of ads they see every day affect them.

Ads exist to make people want______.

A．a new type of orange juice

B．X-brand jeans

C．to watch the latest film

D．what they advertise