问题详情

We can infer from the last paragraph that
A．the more calluses a person has, the more professional he would be.
B．writers often base their writing on personal experiences.
C．Conan Doyle has gone through a period of hardship on his way to success.
D．inspiration was very important for a person to create something.请帮忙给出正确答案和分析，谢谢！