Long-run adjustments in purely competitive markets primarily take the form of

1. variations in the cost curves of different firms in the market.
2. entry or exit of firms in the market.
3. evolution of the market from a constant-cost to an increasing-cost industry.
4. product differentiation.

2. entry or exit of firms in the market.

Explanation:

A perfect competitive market is when there are many buyers and sellers of homogenous goods and services.

Firms sell homogenous products both in the short and long run.

There are no barriers to entry and exit of firms into the market.

Firms in a perfect competition earn zero economic profit in the long run. If in the short run, firms make economic profit, firms enter into the market in the long run.

If in the short run, firms make economic profit, firms leave the market in the long run.

the correct answer is economics is a game without winners or losers.

unlike sports or games economic is a game without losers or winner rather it is a game where everyone wins. parties of business doing businesses exchange money with each other and hence exchange is done on the basis of goods. one party takes the goods and other sales it so there is winner on both sides. each party values more highly the good it gets than the good it gives up. both sides exchange only because both intend to increase their value. so there is no concept of lose or win.

employers prefer to hire ingenious, resourceful people because ingenious people may be more liable to engage in unethical deportment as they can cerebrate outside of the box