1. Several recent studies suggest that a child born into a family
whose members have allergies will probably themselves develop
allergies following the onset of a minor viral infection.
(A) a child born into a family whose members have allergies will
probably themselves develop allergies
(B) children born into families whose members have allergies will
probably themselves develop allergies
(C) a child born into a family the members of which have allergies
will probably develop an allergy
(D) in those families where members have allergies, children will
probably develop allergies themselves（B）
(E) children born into a family in which there are allergies will
themselves probably develop an allergy
我选c ,请问，为什么family用whose指代对，而用of which指代不对？ 有规
定吗？ | 
