在异方差的情况下，参数估计值的方差不能正确估计的原因是 A. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/a4b4f592908a234b3b7c7db742e6356c.jpg"/> B. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/0934a123c4b596f4dd3aa18ec717ec94.jpg"/> C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/10e1987e7c4f9f878d17dfc189b3452a.jpg"/> D. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/eb623185eaed775685ad81a769ba3dfa.jpg"/>