Answer:
A. Rule of three
Step-by-step explanation:
The rule of three is powerful speechwriting technique.
Using the Rule of Three allows you to express concepts more completely, emphasize your points, and increase the memorability of your message.
That’s the truth, the whole truth, and nothing but the truth.
In this case, using the the three examples; opportunities to exercise, take on leadership roles, and make new friends helps the author get across the point that After school activities are important and need to be expanded.