根据短文内容，选择最佳答案。
A girl went to her father to ask for his advice. She was having a hard time in life. It seemed that when one problem disappeared，another one appeared. It was terrible!
Her father，a cook，took her into the kitchen. He took out pans and poured water into the pans to boil.
After the water boiled，he put some carrots into the first pan，some eggs into the second pan and coffee beans into the last one.
After 20 minutes，her father turned off the stove，took out the carrots and eggs and put them in a bowl. He poured the coffee into a cup.
"Dear，what do you see? "he asked his daughter.
"Carrots，eggs，and coffee，"she said.
"Touch the carrots，"he told her. She did and felt that the carrots were soft. After that he asked her to take an egg and break it. She found that the egg was hard. At last，her father asked her to taste the coffee.
"What's the meaning，Father? "she asked.
"The strong and hard carrots became soft and weak after boiling. The fragile（脆弱的） eggs became hard in the boiling water. The coffee beans were very special，but they changed the water around them. " her father said，"As you can see，each thing reacted differently to the boiling water. "
"Who are you? "asked her father. "When you have problems，what will you do? Are you carrots，eggs，or coffee? "
