According to Paragraph 5, which of the following is CORRECT？A．It is necessary to look for

According to Paragraph 5, which of the following is CORRECT？

A．It is necessary to look for treatment when mood changes.

B．Exercising is beneficial to ease seasonal mood changes.

C．People should keep a good mood on Mondays.

D．Seasonal mood changes will not interfere with daily life.

请帮忙给出正确答案和分析，谢谢！