C. Simple. Black Lives Matter.
To start of you need an attention getter, so start with a quote, a fact or something that really sticks out! (DONT USE A QUESTION! THOSE ARE BORING!)
Answer:
Children can learn to help out by completing their chores.
Explanation:
"Their" specifies that it is plural which is also what "Children" specifies. If it were to be singular, you could put "A child can learn to help out by completing his or her chores."
I hope this helps :)