胰腺假性囊肿最重要的临床表现是（）。

A.上腹部包块

B.黄疸

C.胃部疼痛

D.食欲缺乏

E.恶心、呕吐

Assessment of a client in active labor reveals meconium-stained amniotic fluid and fetal heart sounds in the upper right quadrant. Which of the following is the most likely cause of this situation

A．Breech position.

B．Late decelerations.

C．Entrance into the second stage of labor.

D．Multiple gestation.