One of the most important questions they had to consider was         of public health.

A．what

B．this

C．that

D．which

下列不属于敏感性训练目的的是( )。

A．了解自己如何看待别人及别人如何看待自己

B．促使成员的自我知觉更为现实

C．增强群体凝聚力

D．相互交换不满意见及改进建议