Why is zero unemployment and zero inflation not ideal for the economy

What would happen to the equilibrium price and quantity of lattés if the cost to produce steamed milk

In a perfectly competitive market, the long-run market supply curve tends to be horizontal or nearly so. what is another way to state this fact? (a) market supply is much more elastic in the long run than the short run. (b) in the long run, average total cost is minimized. (c) in the long run, price equals marginal cost. (d) market supply is much less elastic in the long run than the short run.

Which of the following has the largest impact on opportunity cost