People may have different opinion about Karen, but I admire her, ______, she is a great musician. [ ]

A. after all

B. as a result

C. in other words

D. as usual

下列单位和个人，不属于资源税纳税人的是（）。

A.开采原煤的私营矿山

B.进口铁矿石的国有冶炼企业

C.开采石灰石的个体经营者

D.开采天然原油的外商投资企业