We can be proud of ourselves, but we had better find out _____ we have got to be proud of. [ ]

A. what is it that

B. that what it is

C. what it is that

D. that what is it

《物权法》所称的物权，是指权利人依法对特定的物享有直接支配和排他的权利，包括使用权、用益物权和担保物权。