A Court Decision Forbidding Resale Price Maintenance Would Mean That

A court decision forbidding resale price maintenance would mean that

A) firms that were not horizontally integrated would not enjoy the advantages of horizontally integrated firms.
B) competition among producers would decrease.
C) competition among retailers would increase.
D) firms that were not vertically integrated would not enjoy the advantages of vertically integrated firms.
E) it would become profitable to merge horizontally.