Lewis is a city planner who has been fascinated by the development of Sarasota, Florida. He believes that in the future, an increasing number of cities will look like Sarasota, where more than 30 percent of the population is over age 65. His friend, who works in Detroit, wonders how Lewis is so sure that the American population will rise. Lewis admits that, of course, the future cannot be predicted. However, all of the following explain why the median age of the U.S. population will probably increase in coming decades EXCEPT for:

-declining fertility.
-longer life expectancies.
-an expected rise in immigration.
-the large baby boom generation reaching old age.