The adverb that modified the verb (finished) is quickly.
Adverbs answer the question: HOW IS THE ACTION DONE?
So,
How did John finish his work?
He finished it quickly.
Admiral McRaven took the abstract and overwhelming concept of “changing the world” and broke it down with a simple argument: Everyone can make a global impact by improving the lives of ten people. Give your audience measurable steps they can take today to put that inspiration into action.
B. it states the main idea i.e. the topic of the essay
It would be nine thousand two hundred