—What do you think of the meeting held yesterday evening?

—It was a tiring one,         I kept falling asleep.

A．where

B．which

C．that

D．during which

女性，34岁，右 * * 溢血12天，左上象限可扪及一无痛性包块。行右乳包块切除，大体切面灰褐色，显微镜下见乳腺导管扩张，囊内充满非典型性细胞，呈实心团块状(如图)，免疫组化提示导管肌上皮细胞完好(如图)。最适当的诊断为()

A．乳腺纤维腺瘤

B．小叶原位癌

C．微小浸润性乳腺癌

D．浸润性导管癌

E．导管原位癌