It is usually the last sentence in the first paragraph and it tells what the essay will be about.
Answer:
I depend on WHOEVER sits in the front to stay awake and look for police cars.
Answer:
When "Star Trek" premired in 1966, few expected it to be such a hit.
Explanation:
I don't see the letter C next to it, but I assume this is answer C. Anyway, the reason this is a good introduction is because it strays away from opinion, and it is relevant to the topic. Answer A is highly opinionated. Answers B and D are not relevant to the topic, so the answer is C.
Answer:
her dogs are being killed by her
