单项选择题

A.分娩时可见羊水混有胎粪
B.患儿皮肤、脐带和指(趾)甲床留有胎粪污染的痕迹
C.口、鼻腔吸引物中含有胎粪
D.气管插管时声门处或气管内吸引物可见胎粪