--Sir, I feel it complicated to apply to a university abroad.

--Why not read our guide? This is ________ the relevant information is available.

A．what

B．how

C．where

D．that

若供应商与采购方彼此都认为对方很重要，这时供应商对于采购方是（）

A.重点商业型供应商

B.优先型供应商

C.商业型供应商

D.伙伴型供应商