A:2—乙基—3,3—二甲基戊烷
B:3,3——二甲基—4—乙基戊烷
C:3,3,4—三甲基已烷
D:2,3,3——三甲基已烷
I am strongly ________ keeping animals in the zoo, because I think animals should also have the right to enjoy freedom.