Answer:
a) True
Step-by-step explanation:
The market for public utilities tends to produce natural monopolies, because of the high fixed costs, and the high barriers to entry.
For example, in order to provide electricity, a company has to invest a lot of money to set up the infraestructure (barrier to entry), and once the infraestructure has been put in place, it has to be maintained, which represents very high fixed costs.