There was a little boy who had a bad temper. His father gave him a bag of nails andtold him that every time he loses his temper,he must hammer a nail into the fence.The first day, the boy had driven 37 nails into the fence. Over the next few weeks as he learned to control his anger, the number of nails daily gradually dwindled down. He discovered it was easier to hold his temper than to drive at all. He told his father about it and the father suggested that the boy should pull out one nail for each day he was able to hold his temper.

The days passed and the young boy was finally able to tell his father that all the nails were gone. The father took his son by the hand and led him to the fence. He said, "You have done well, my son, but look at the holes in the fence. The fence will never be the same. When you say things in anger, they leave a scar just like this one."

You can put a knife in a man and draw it out. It won't matter how many times you say "I'm sorry", the wound is still there.

What can we learn from the story above?
A. Do not hurt other people's feeling.
B. Everyone can get angrt,so be careful.
C. Do not be angry because it hurts our hearts.
D. Making someone angry Will hurt you​