What is the definitions of style in terms of writing and speech?

The way a writer uses language to establish mood and convey meaning, as well as specific rules about grammar and formatting.

Explanation:

1.It cannot be A because the reason an author has for writing or speaking is called the author’s purpose.

2. It cannot be B because when you think of style, you think of how one goes about doing or saying something.

3. It cannot be C because people who read your work are known as the audience.

Thus, the answer is B because, again, when you think of style, it is the way someone does or says something. This can apply to writing too.