It's helpful to put children in a situation _____ they can see themselves differently. [ ]

A. that          

B. when        

C. which      

D. where

继电保护装置、安全自动装置及自动化监控系统做传动试验时，应通知_____和有关人员，并由工作负责人或由他_____到现场监视，方可进行。