Plato user

which statement is false?
a.
a monopoly sells lower-quality products at higher prices than in a perfect competition.
b.
natural monopolies are necessary to avoid wasteful duplication of resources.
c.
collusion is legal in the united states, but cartels are not.
d.
the start-up costs in a monopolistically competitive industry are low.
e.
homogeneous products leave consumers with no choice.