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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？

谢过了！！