The heading of an ad in a women's magazine reads, "charlotte bb cream has been approved by dermatologists. it is good for sensitive skin and has no side effects." the rest of the ad copy explains the benefits of the bb cream and features user testimonials. by placing its most important message in the heading, the ad's source is hoping its message benefits from the:

a.
primacy effect.
b.
recency effect.
c.
sleeper effect.
d.
credibility effect.
e.
compliance hierar

Option (A)

Explanation:

Here, in this particular case the ad's source are believing that their message will benefit from the primacy effect. The ad organization is using the primacy effect, so as to have their customers commemorate the first section or piece of the information they come across better than the information which is further presented at the later stage.

Here in this case the Charlotte BB cream is putting forth the prime message , i.e. the cream is good for sensitive skin and is tested by dermatologist and later rest of the message continues.  

answer; vertical marketing system;

b is the correct answer