We can infer from the last paragraph thatA．the more calluses a person has, the more profes

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.