下列叙述正确的是

A．1 mol CO₂的质量为44g/mol

B．CO₂的摩尔质量为44g

C．CO₂的摩尔等于CO₂的相对分子质量

D．N_A个CO₂的质量与CO₂的相对分子质量在数值上相同

He told me he was satisfied with______.

A． all what I said

B．that I said

C．whatever I had said

D．no matter what I said