Which statement best describes hardin's use of rhetorical appeals?

a. hardin uses an ethical appeal to make himself seem trustworthy by admitting that there are "harsh" elements to his argument.

b. hardin uses an ethical appeal to show that he is an expert by continuing to use the "lifeboat" metaphor throughout the essay.

c. hardin uses an emotional appeal to elicit an emotional response from the audience and make them feel sorry for poorer nations.

d. hardin uses a logical appeal to make a rational plea to the audience by describing the difference between rich and poor nations.