Mass communication uses gatekeepers to determine what consumers come to know, believe, and understand are issues they should deem as worthy of serious attention. This view of how mass communication operates represents .

Agenda-setting theory

Explanation:

Gatekeepers are people or policies that are responsible for the process through which information is filtered for dissemination through any means of communication. The agenda setting theory describes how the media can be influenced thus affecting the public mind. Media provides information which they deem most relevant by what they think reflects people minds and are the major issues of the society.

Consumer tastes or preferences would most likely have an effect on B. DEMAND.

If a product is numerous and affordable but is not in accordance to consumer's taste or preference, then there will be no demand on the product supplied.

If the product has limited stock and is costly but it is preferred by the consumers, then demand of the good will still be steady.