Answer:
A. The speaker identifying his or her credentials and authority.
Explanation:
Notice that the parent-teacher conference speaker sounds particularly confident in the argument he/she is trying to make. That's because the speaker is a bank manager, and that workforce position qualifies for the topic he/she is discussing. The audience will be convinced that Springville High should start offering proper financial education because of her knowledge on the idea that most high schools do not cover financial education based on the teachings of his/her children and probably some freelance research.