Please lemme know whether we can use "not x but rather y" idiom as "not x, but rather y" i.e. with comma? below is an example to get an understanding of this issue.. now in option 1 is the usage of ".., but rather.." correct? i mean leave all other errors(if any) aside in A for a moment and consider only ...., but rather... So, please confirm whether in any case we can use "not x, but rather y" i.e. with comma in between..
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
E. family, but also a modified and extended family, is based on a number of facts: three-generational families exist
BTW OA : D

















