What should be done when a relative decides to join？A．Try not to be partial.B．Help him to

What should be done when a relative decides to join？

A．Try not to be partial.

B．Help him to gain popularity among employees.

C．Never promote him to a higher position.

D．Encourage him to find proof for his knowledge.

请帮忙给出正确答案和分析，谢谢！