What Is the Difference Between a Purpose Statement and a Thesis

What is the difference between a purpose statement and a thesis statement?

A) A purpose statement is delivered directly to the audience and provides the central idea of the speech.
B) There is no difference between the purpose statement and the thesis statement.
C) A thesis statement outlines one of three basic ways a speaker seeks to affect an audience: to entertain, inform, or persuade, while a purpose statement descripts the precise effect that the speaker wants to have on an audience.
D) A purpose statement describes exactly what you want your speech to accomplish, while a thesis statement tells your listeners the central idea of the speech.