The answer is the third choice or choice C. Persuade means to CONVINCE someone to try to do something or try something. In this case the speech is PERSUADING the audience to become vegetarians.
I think the answer would be the spelling of Emily Dickenson is wrong. So she is the answer. However, Emerson's transcendentalism influenced the work of writers Henry David Thoreau, Walt Whitman, and Emily Dickinson. The transcendentalists championed individualism.