The Fact That Maine, Pennsylvania, and West Virginia Follow Florida

The fact that Maine, Pennsylvania, and West Virginia follow Florida as the states with highest proportion of residents over age 65 illustrates that:

A) most elderly people want to retire to warmer environments.
B) only a few states have an adequate number of planned retirement communities.
C) most people prefer to age where they have always lived.
D) the old tend to congregate in a few parts of the country.