An effective persuasive speech incorporates a mix of support materials. These are the details that provide your audience with evidence about the need/problem you are addressing and the evidence about the solution you are presenting. Types of support materials are:

Scientific evidence such as statistics; images that underline your words; quotes by respected persons connected to your field of study; field research data; historical background of the need/problem you are addressing.

Explanation:

I´m sure there must be many more but these are the ones that come to mind when I imagine myself trying to persuade people of the importance of my solution to a given problem.

i would pick a. i think this is more of a personal question though.