The correct answer is C) A small group of people could now own and operate multiple companies in an industry.
The development of the trust changed the way businesses operate in that "A small group of people could now own and operate multiple companies in an industry.
Trusts created monopolies during the Gilded Age. Wealthy people started to buy their competitors until they practically owned the entire operation vertically and horizontally. That was the case of the Standard Oil Company owned by John D. Rockefeller or the Steel Company owned by Andrew Carnegie.
