I would choose answer C.
this is because the format of the essay is been informative, and that sentence was opinion orientated, while all the other options presented statistics.
I believe it could refer to the fact the joy is in fact joyful
If I was in that nail salon and saw a person stealing someone else’s engagement ring, I will immediately stop the pickpocket. After making sure that the thief has not possess any dangerous weapon, I will slowly approach and ask him the reason for doing it. Meanwhile, I will signal the bystanders to seek help from police. I then give him advice and tell him the consequences of stealing. It is because everyone has no right to go shortcut in life. We need to pay our effort for the result. Next, I will ask him to apologize to the owner and motivate him to be an honest man.
https://teachfieldsteach.weebly.com/uploads/2/2/3/6/22363588/immigrant_contribution_by_jfk.pdf
