Answer:
i play tennis, and before a match it's customary to practice with your opponent. it gives you a chance to see how to the other player plays the game. plus if you're practicing it's not competitive, it's cooperative. so you aren't trying to beat each other at practice.
Answer:
C. Helping to improve someone else's writing making you a better writer too.
Explanation:
It isn't A. because that supports an opinion, not a fact.
It isn't B. because it does not elaborate on how the classes are helpful and educational.
It isn't D. because, like above, it is not specific enough.
Hope this helps! <3