在公开选拔、竞争上岗工作中，党委（党组）集体讨论认为无合适人选的，该职位是否可以空缺？

—I think English is the most difficult subject.    

—_____.I think math is more difficult than English.    [ ]

A. I think so    

B. I don't hope so    

C. I agree    

D. I disagree