Our understanding was that she would continue to cover the costs of school enrollment and room and board for the children, which she verbally agreed to pay with the rest of the family.
a)which she verbally agreed to pay with the rest of the family.
b)which she agreed verbally with the rest of the family to pay.
c)of which she agreed verbally with the rest of the family to pay.
d)both of which she verbally agreed to pay with the rest of the family.
e)both of which she agreed to pay with the rest of the family verbally.
I felt the correct answer is E but OA is B. Ron, please explain how use of which is right here (if it is). Not satisfied with the OA.
Source: GMAT club test