It can be inferred from the first paragraph thatA．up to now, Richard doesn"t know he has c

It can be inferred from the first paragraph that

A．up to now, Richard doesn"t know he has caught certain disease.

B．there was something wrong with both Richard"s mental and physical health.

C．but for his illness, Richard would not have stopped working.

D．Richard"s illness offered him a chance to think about his life.

请帮忙给出正确答案和分析，谢谢！