Answer:
Activist Group A is using the peripheral route and Activist Group B is using the central route.
Explanation:
Under the peripheral route, a person makes simple assumptions about a postition based on positive or negative cues, and is not related to logical reasoning. The stimilus probably will be attractive to provoke a quicker response. If someone under the peripheral route is trying, for example, to buy a car, he will probably base his decision on the colour, speed or even how attractive the car is to others.
Under the central route, a person thinks deeply about the real merits of a position. Using the same car example, a person under this route will probably look for the cost, reliability, and may read reviews before buying. This depends on the recipent's ability to form an argument and his/her attitude towards the position --that is, a negative attitude is very likely to resist the message despite the merits presented.