According to the passage, which is NOT TRUE of sickle-cell anemia？A．It is inherited.B．It i

According to the passage, which is NOT TRUE of sickle-cell anemia？

A．It is inherited.

B．It is not contagious.

C．It can be cured.

D．It occurs mostly in Africans.

请帮忙给出正确答案和分析，谢谢！