They will complete the work ______.

A．after a few weeks’ time

B．in a few weeks’ time

C．after a few weeks’ time

D．in a few week’s time

男，65岁，进行性黄疸3个月，伴中上腹持续性胀感，夜间平卧时加重，消瘦显著。查体：慢性消耗性面容。皮肤、巩膜黄染。腹平坦，脐右上方深压痛，未及块物，Courvoisier征阳性。首先考虑的诊断是（）

A.慢性胆囊炎

B.胆石症

C.原发性肝癌

D.胃癌

E.胰头癌