The answer is A - The minister’s sermon was very short and interesting.
This is a simile as it compares two things using the word like. It compares her running across the grass to a cheetah chasing its prey, implying she is running very fast
The process of determining what to study is especially very important because the prepared mindset of a person is necessary in undertaking a new endeavor in life especially when it is about studies. It is important that you should choose course that fits your capability or the one which you like doing the most in order to bring out the best in you.