Mutual Interdependence Occurs When

Mutual interdependence occurs when

A) all firms in an industry are affected by the same macro economic conditions,such as a recession,inflation,interest rates,exchange rates,etc.
B) the actions of firms are independent of each other.
C) the actions of one firm in an industry are easily recognized and perhaps copied by others.
D) monopolists recognize that they must face eventual competition in the long run.