Answer:
C. the government makes collusion illegal with antitrust laws because monopolies reduce economic efficiency.
Step-by-step explanation:
Collusion is an agreement that is made between rivals aimed at disrupting market equillibrum. Companies that will usually compete against one another collude together to gain an unfair advantage.
To provide a level playing ground for all parties in a market the government implemented anti trust laws that makes collusion illegal. Companies are prevented from gaining unfair advantage.
Monopolies are example of companies regulated by antitrust laws. When one player determines supply and price in an economy efficiency reduces. There is less competition so the supplier is not motivated to supply adequate product to the customer.