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.
The answer would be D, since a quartet means 4, and a triumvirate means 3. So again the answer is 4:3.
C. A hook
Explanation: the hook is what draws the readers attention in, the hook is is the very first sentence so that the readers can be interested in what the topic is about.
It would be the level of the river rose last. I belevie it is intransitive but i could be wrong.