The common causative agents of echinococcosis （）

A.Metacestode of Echinococcus multilocularis

B.Cysticercus tenuicollis

C.Metacestode of Echinococcus granulosus

D.Cysticercus pisiformis

正确答案：Metacestode of Echinococcus multilocularis；Metacestode of Echinococcus granulosus