Bonita presented a speech about the proper diet for energy and well-being. when discussing various foods that boost one's energy, she noted that her parents had been following a new diet prescribed by a dietician and had experienced higher energy levels as a result. her use of her parents' statements constituted the use of
a) personal testimony
b) lay testimony
c) expert testimony
d) prestige testimony

B) lay testimony

Explanation:

Lay testimony is a testimony based on an opinion of a witness who can share their testimony because they are expert on that information they are testifying about like Bonita had previously presented a speech on diet for energy and wellbeing so she is able to use that information in order to interpret the benefits she sees in her mom and dad after they have been dieting.

well considering i can't see the graph, it's probably prices