This painting is so valuable that it is rather difficult to calculate _______ its price would be if the museum _______ to sell it.

A．how much; would want

B．what; wanted

C．what; wants

D．how much; wants

( )是人民警察必须坚持的党性原则，也是人民警察区别于剥削阶级警察的根本标志。

A．全心全意为人民服务的公仆意识

B．对党、对人民的绝对忠诚

C．一不怕苦、二不怕死的无私奉献意识

D．除恶安民的人民民主专政意识