<span>All of these can be true of fad diets but A is especially true. You need a balance of foods in order to be healthy and many fad diets don't support this. They teach dieters to eat a lot of a few types of food which creates an unhealthy idea of how to lose weight.</span>
Answer: Price differentiation
Explanation:
The startegy used by the theater company to shift demand for theater tickets is differentiating on the price. Price differentiation is a pricing strategy whereby difeent sets of customers are charged different prices for the same good or services.
The theater company gives 30% discount for people who buy the tickets early compared to people who buy the ticket on the day of the performance. This so differentiation on price.