题目选项分析

In Washington County, attendance at the movies is just large enough for the cinema operators to make modest profits. The size of the county`s population is stable and is not expected to increase much. Yet there are investors ready to double the number of movie screens in the county within five years, and they are predicting solid profits both for themselves and for the established cinema operators.

Which of the following, if true about Washington County, most helps to provide a justification for the investors` prediction?

【选项】Over the next ten years, people in their teenage years, the prime moviegoing age, will be a rapidly growing proportion of the county`s population.