Answer:
A. The introduction is effective because it presents the topic in a compelling way, establishing a strong main point, and offers important supporting information.
Step-by-step explanation:
In order to have a strong and effective introduction, you need to have a claim. Then use reasons for your claim. Next you'll want to use evidence that backs up your reasons before finally wrapping it all up with a conclusion. In the conclusion, restate your claim and why you think that way.