The best answer is indeed letter A. thesis statement.
Explanation:
A thesis statement consists of one or two sentences with the purpose of informing the reader about the author's opinion and the subject of what will be read, as well as guide the author so that they won't lose focus. The thesis statement usually comes at the end of the first paragraph of a persuasive essay. Thus, the best option to complete the sentence is : In a persuasive essay, the thesis statement expresses the writer's opinion on the topic to be discussed.
A call to action is a word or a phrase that urges the audience to do something. A slogan is a catchy phrase or motto that expresses the purpose and characteristics of an organization or cause. Emotional appeal (pathos) is persuasive device that evokes certain feelings to convince the audience of something.
