溶组织内阿米巴流行与防治，哪项是错误的

A．苍蝇可造成该病的传播

B．带囊者为该病的传染源

C．农村的感染率高于城市

D．预防该病要注意个人卫生和饮食卫生

E．只有儿童、孕妇可受到感染

---We all wonder ____ the relationship between France and China is good again now?

---Because the two countries have common national benefits.

A．why it is that

B．why it is

C．that it is why

D．it is why