What is the central idea of the last paragraph?

What is the central idea of the last paragraph?

A.Morgan Rees has worked until he is 76.

B.Morgan Rees has developed the export market and improved the profits by 200%.

C.Morgan Rees hasn’t been bored since he bought the factory.

D.Since he started working again. Morgan Rees has expanded the company considerably, which has enriched his retired life.

正确答案是D