The driving statement of your expository essay is a) the hook b) the thesis statement c) an introduction statement d) none of the above

In most essays, this answer is the same.

Thesis: Within the introduction paragraph, this is one or more sentence(s) that summarizes all points in your essay, which you will later back up with evidence. This is the driving point of your essay.

A hook: Usually found in persuasive essays, a hook is an opening statement that clearly shows where the author stands on a given topic, while trying to convince the audience of the same. This can also be used in books, one sentence that immediately captivates the audience. 

An Introduction statement: Every essay has an introduction. This is known as the first paragraph as a whole. What's IN the introduction is what varies.

Your answer is B: The thesis statement

~Hope this helps!