高中程度英语句子理解,( ) 7.The two sisters were so alike that I could

高中程度英语句子理解,
( ) 7.The two sisters were so alike that I could hardly tell one from the other.
A.The two sisters were very much like each other and so I couldn’t separate them.
B.The two sisters looked the same so I didn’t have to find any didderence between them.
C.The two sisters were very much alike and I hardly knew to tell them.
D.The two sisters were so alike each other that I didn’t know the difference between them
C,D里面我不确定选哪个，