When parents are unable to resolve the conflicts between them, a common pattern is to continue to ...

When parents are unable to resolve the conflicts between them, a common pattern is to continue to argue through the children. When father says mother is too permissive, she says he's too strict.
 
  He may in turn withdraw, and she responds to
  the child with excessive concern and devotion. The structural term which best
  describes the resulting family structure is:
  a. diffuse boundaries between husband and wife
  b. a cross-generational coalition between mother and child
  c. overinvolvement between father and child
  d. a pathological triangle