When a text encourages the reader to believe or do something, the author's purpose is
abel
to entertain.
to inform
to persuade.
to explain.

to persuade.

Explanation:

Sometimes, the author attempts to convince the reader to have a particular opinion. This is known as persuasive writing.

There are many persuasive essays and articles that deal with controversial topics such as gun controls, abortion, death penalty, etc. In this kind of writing, the author wants to prove that his argument is valid, and thus make the reader agree with him. In a persuasive piece of writing, the author might also try to encourage the reader to do something that will change a particular situation.

its C

Explanation:

d is the best answer for this question.