Respuesta :
THE REAL ANSWER IS NEITHER A OR D THE REAL ANSWER IS B: A GROUP OF RAILROAD COMPANIES RUN BY ONE MANAGEMENT
A Trust is a group of companies in a particular market cooperating with one another as a group of corporations or as a corporation.
For this reason, the only alternative that relates to that description is alternative B) "A group of railroad companies run by one management"
This is a trust because there is a group of companies working together as a corporation under one management.