885 - d- 20

The argument that the dominant form of
family structure today is not the nuclear family, but rather it is a family
which is modified and extended, is based on a number of facts: the existence of
three-generational families, the amount of vertical and horizontal
communication between family subunits, and the extent to which family members
offer assistance to one another.

(A) family, but
rather it is a family which is modified and extended, is based on a number of
facts: the existence of three-generational families

(B) family, but is
instead a family that is modified and extended, is based on a number of facts:
three-generational families exist

(C) family, which
has been modified and extended, is based on a number of facts: the existence of
three-generational families

(D) family but a
modified extended family is based on a number of facts: the existence of
three-generational families（D）

(E) family, but
also a modified and extended family, is based on a number of facts:
three-generational families exist

the answer is D?     i am highly skeptical