巨幼细胞性贫血患者的红细胞平均指数为 ( )

A.MCV＜正常，MCH正常，MCHC正常B.MCV＜正常，MCH＜正常，MCHC正常C.MCV＞正常，MCH＞正常，MCHC正常D.MCV＜正常，MCH＜正常，MCHC正常E.MCV＞正常，MCH正常，MCHC正常