The correct response is Option A: Hoover expanded tax cuts among all income classes.
Explanation:
The Hoover-Mellon tax cut in 1929 was supposed to help ease economic problems by giving cuts in corporate taxes to businesses and individual citizens, although deeper economic problems were beginning to become evident. It was an experiment in confidence-building. Initially, it was a popular idea with tax-cut supporters mounting a rally at the Capitol that included film and radio stars like actress Mae Murray. There were petitions circulating in favor of the cuts. This effort to appease the public shows the dilemma facing incumbent presidents because they have to please the public and deliver on campaign promises.
In an explanatory essay, or any essay, the introductory paragraph introduces (hence it's name) the main idea, or what you are going to explain. The body paragraphs go into extreme detail of what the introductory paragraphs mentioned.