第三节 短文理解2
阅读下列短文，从[A]、[B]、[C]三个选项中选择一个正确答案。
My sister and I looked forward to new clothes for the New Year. But one day my mother said, "Listen, children. We don't have enough money now. So only one of you can get new clothes." he silence (寂静) lasted for a few minutes. My tears (眼泪) were coming out.
"OK, I have an idea," my sister said. "I'll write 'new clothes' on a piece of paper and 'nothing' on another. We cast lots (抽签) to decide."
I agreed. While she was writing at the table. I found her clothes were old and she had grown too big for the clothes. I looked at my own. They were old, but still the right size for me.
"Pick one," my sister said.
I picked one and opened it. Two words ran into my eyes: NEW CLOTHES. I forgot my sad feelings and jumped up.
A few days later. I ran into the sitting room in my new clothes where my mother and my sister were reading. My sister gave me a smile and went on reading. My mother called me to her side and showed me two pieces of paper. On each of them was written: NEW CLOTHES.
Why could only one of the two sisters get new clothes？

A. The family was short of money.
B. The writer's sister already had new clothes.
C. The writer's sister did not want new clothes.