HELP PLEASE-
A trust, as developed by John D. Rockefeller and facilitated by J. P. Morgan, can best be described as
A) a legal formalization of vertical integration within a market.
B) a legal combination of firms managed as a single monopoly or near-monopoly.
C) a legal collusion of a small group of separate firms that control prices.
D) a legal form by which new corporations are created to increase competition.