Step 1: Understanding the Concept:
This question is about a key point made in an essay discussing the freedom of the press, likely Dorothy L. Sayers' "How Free Is the Press?".
Step 2: Detailed Explanation:
In her essay, Sayers argues that the press is not as free as it seems. She contends that the editorial policy of a major newspaper is largely determined by two main factors. These are: 1) The proprietor of the paper (the wealthy individual or corporation that owns it) and their personal interests, and 2) The advertisers who provide the paper with a major source of revenue and whose products the paper cannot afford to offend. Thus, the policy is controlled by these two powerful influences.
Step 3: Final Answer:
The essay argues that there are two chief factors controlling a paper's editorial policy. Therefore, option (B) is the correct answer.