— Where is the school singing contest going to be held tonight?

— I am not sure. Is it in the hall _________ the students often have a meeting? [ ]

A. where

B. which

C. that

D. when

梅奥认为，解决社会和个人的解体问题在于______，在于回到控制“边缘”组织、建立行政管理精英、获取科学知识以及确立一种适合社会需要和问题的教育过程。