Answer:
C.
Step-by-step explanation:
There are different intended audiences that a source or excerpt may be aimed at. For example, for whom was Mao's Red Book aimed at? Was the Red Book's primary audience the general public to sway their support for his Communist movement? There are different news article publishers that publish articles for different people, there are the conservative leaning websites, and there are the liberal leaning websites. These websites target different audiences, or in your case, primary audiences. Hope this helps!