关于人工瓷牙正确的是（）。

A.硬度大，咀嚼效率高

B.脆性大，易磨损

C.光泽好，不易变色

D.比塑料重

E.与基托结合较塑料牙差

They used to quarrel a lot, but now they are completely () with each other.

A. reconciled

B. negotiated

C. associated

D. accommodated