阅读下面语篇，从各小题所给A、B、C三个选项中，选出最佳选项。
One day, a little boy asked his father, "What does the word ‘great' mean? 1 are great people and how do they become great?"
The father asked his son to bring two plants and then told him to plant one of them inside the house and the other outside the house. The boy did as his father said.
The father asked his son, "Which one of the two plants do you think will be safer and bigger?" "The plant inside the house will be safer, 2 it will grow bigger, while the plant outside the house is not safe at all. No one will be there to 3 it. It may be eaten by animals."
The father smiled and said, "Let's wait 4 . We will know the answer."
Then the boy left for study and after four years he came back to his house. He said to his father, "Look, 5 happens to this plant inside the house and it is safe."
When the boy went outside, he was very 6 to see a big tree. The boy couldn't believe his eyes. He couldn't 7 how the plant outside was able to grow much bigger than the plant inside the house. "The plant outside the house faced every 8 and many difficulties!" the father told his son why the plant outside was bigger. "The plant inside was safe, it didn't face weather changes, and it didn't get 9 sunlight, so it didn't become big."
Here is the answer to the question about being great: To become a great person, one must have failed many times, experienced many difficulties and then 10 them. Only after that he is able to become great.
B. 
C. 
E. 
F. 
