While price supports for dairy products will save jobs in the dairy industry, they will also endanger jobs in other food industries. Because price supports will make dairy products more expensive, families will spend a greater portion of their food budgets on dairy products.
The author’s argument depends on which of the following premises?
  1 Most consumers would not prefer lower-priced dairy products to other lower-priced food items.
  2 If dairy price supports are implemented, there will be an increase in the number of jobs in the dairy industry.
  3 Consumers would spend more money on other types of food if there were no dairy price supports.
  4 If price supports for other food products were implemented, sales of those products would decline.
  5 The quantity of dairy products sold will decrease if price supports are implemented.


答案3    Refer to the last sentence of the argument.
我感觉假设应该是奶制品价格提高后人们还会去买奶制品，虽然没有这个答案

假设总是远不止一个的么