阅读下列短文 ，从每题所给的四个选项 （A 、B 、C 和 D ）中 ，选出最佳选项
Each morning Grandpa was up early sitting at the kitchen table, reading his book. His grandson wanted to be just like him and tried to copy him in every way he could.
One day the grandson asked, “Grandpa, I try to read the book just like you, but I don’t understand it, and I forget what I understand as soon as I close the book. What good does reading the book do”
The grandpa quietly turned from putting coal in the stove and replied, “Take this coal basket down to the river and bring me back a basket of water.”
The boy did as he was told, but all the water leaked out before he got back to the house. The grandpa laughed and said, “You’ll have to move a little faster next time,” and sent him back to the river with the basket to try again.
This time the boy ran faster, but again the basket was empty before he returned. Out of breath, he told his grandpa that it was impossible to carry water in a basket, so he went to get a bucket instead.
The grandpa said, “I don’t want a bucket of water； I want a basket of water. You’re just not trying hard enough.”
The boy again dipped the basket into the river and ran hard, but when he reached his grandpa the basket was empty again. Out of breath, he said, “Grandpa, it’s useless!”
“So, you think it is us