According to recent studies, which of the following is true of centenarians?

The level of education is unrelated to the life span of centenarians.
In developed countries, the number of centenarians is decreasing at a rate of approximately 7 percent each year.
China has the most centenarians, followed by Brazil, Canada, and Australia.
Chronic high-mortality diseases are markedly delayed for many years in centenarians.

Chronic high-mortality diseases are markedly delayed for many years in centenarians.