题目内容：
根据短文内容，回答题。When l was learning calligraphy(书法)，my teacher told me a story．
A calligrapher taught handwriting．One of his students who often practiced handwriting with old sheets of newspaper complained that he made very little progress though he had learned it with the calligrapher for a long time．His teacher said t。him，“Try to use the best paper．Maybe you’11 write better．”
The student did as he was told． It really worked．He made headway not long afterwards and felt curious．He asked his teacher about the reason．The calligrapher answered，“When you used old newspaper to practice handwriting，you would think you were writing a draft．It didn’t matter if you wrote badly as old newspaper was plenty in supply．In that case you wouldn’t pay much attention to it．Now you use the best paper and you treasure it．Each time you write you feel strongly about the raritv of chances and you’11 devote to it with all your heart and soul；you’11 do the handwriting much more attentively than practicing．Of course you’ve made rapid progress．” ．
Indeed，we spend our ordinary days just as they are worthless “old newspaper”． We don’t care if we scrawl and waste it，thinking that it will come endlessly the “old newspaper” is inexhaustible． In such a mood we may pass each day by opportunities but fail to catch any of them.
Life is not a military exercise but an actual war in which real weapons are used． In everyday life there’s no chance for us to draft．That’s because what we call “draft” actually is the ANSWER SHEET we write that cannot be changed．
Every day of life is something new ，Let us take every day as sheet of the best paper.
The calligrapher in the story told the student to write on write on the best paper because he thought _________. A．the student would practice more carefully on the best paper
B．it was comfortable to write on the best paper
C．the student had enough money to buy the best paper
D．the student could write more on the best paper
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