Choose the statement that indicates the longevity of Americans is increasing. Question 29 Select one: a. The incidence of Alzheimer disease is decreasing annually. b. The American culture is changing, placing a higher value on the aged population. c. The pharmaceutical industry is developing flu vaccines. d. The number of people older than 80 years old is expected to increase by 1 million from 2010 to 2020. e. One in seven individuals, or almost 15% of the population, is 65 or older