Which example describes a violation of the Sherman Antitrust Act?
A.
At one time, AT&T was the only provider of phone services in the United States.
B.
The US Postal Service is the only provider of first class mail delivery in the United States.
C.
In most US towns, a single company provides garbage collection and recycling services.
D.
Most US residents get their water and sewer services from through their local governments.