Answer:
How much the audience already knows about an event (option C)
Step-by-step explanation:
For this question, it seems like the point of view and the knowledge of the audience are both important, and they are,
but, a newspaper should be unbiased/the point of view shouldn't really matter
so, one of the most important aspects is how much the audience already knows. This allows newspaper articles to give enough information that the newspaper is able to be read, but not so much redundancy to bore readers.