C. Discuss a time when you met your childhood hero.
Explanation:
A reflective essay generally asks for you to "reflect" or look back to the past and the history of your life, and answer with a certain period of your life that can fit the prompt, in this case being a meeting with a childhood hero.
Type with your essay if you got one and type one paragraph with your intro and your 2nd with the mixed info and also 3rd as well and add some other detail and then your conclusion about it. I hope that is helpful.