Out of the three industries, a monopolistically competitive
market can sustain long run Economic profits.
A monopolistically competitive market is a market structure in
which many firms sell differentiated products which are not the
substitutes of other goods sold by other firms.
The firms belonging to this market can sustain long run
Economic profits, as they decide the quantity of output they wish
to sell and set the price at which they wish to supply their
goods.
Their pricing and quantity supplied decisions are independent
of other firms in the market.
This will increase the profits they earn in long run and
attract other firms into the market.