What is the decision of a monopolist? The position and shape of the cost curves differ in the short and long term. It does not necessarily operate ...

What is the decision of a monopolist?
The position and shape of the cost curves differ in the short and long term.
It does not necessarily operate on the efficient scale in the long run.
The demand curve dictates its production and price decisions.
Possible conflict between maximizing profit in the short and long term.
Monopsonies and focus on the input market.
It reduces consumer welfare by charging more.
The government can regulate prices (ceiling), quality, or even nationalize the sector to reduce the decline in consumer welfare.
It does not need a strategy against direct competitors.
But it must observe substitute products, potential competitors, its demand curve, cost structure, and government regulations.

a) I, II, and III are correct.
b) IV, V, and VI are correct.
c) VII, VIII, and IX are correct.
d) I, III, and IV are correct.
e) All are correct.