健康教育要提供人们行为改变所必需的（）。

A.相关知识

B.诊疗技术手段

C.救护常识和技术

D.检测手段和服务

E.知识、技能与服务

Helen listened carefully ______ she might discover exactly what John wanted. [ ]

A. so as that

B. in order that

C. in order to

D. so as to