— Dad, can you meet my demand        I        a chance to travel to Beijing?

— Unless you will get an A in the final exam.[ ]

A. as; will be given              

B. what; should be given  

C. that; be given             

D. that; might be given

依据华电集团《电力安全工作规程》（热力和机械部分）对生产厂房装设的电梯有何要求？