Your answer would possibly be Arguments. Let me know if I am incorrect.
Answer: This was the answer to a previous question I helped someone with, so I am just copy-pasting it here since it fits all the criteria of your question:
English should be America's national language because the population percentage of people who do not speak English at home are at 19.7 percent, leaving 80.3 percent to full English speakers. Even though Europeans came later, its populace of Europeans grew faster and larger than had it been elsewhere. In conclusion, the English language should be declared as the number one language because it is spoken more throughout the country, and it's developed new accents in interior states.
Explanation: hope this help :)
I would have to say A would probably be the best answer because the others are just a regular sentence telling them about the positive things about volunteering but A has a quote and to me that helps get people interested better.