Question

Increases in life expectancy in the United States during the twentieth century were due primarily to

a. the control of childhood and infectious diseases.
b. the fitness boom.
c. increased use of vitamin supplements.
d. the defeat of chronic illness.

Answer 1

Answer:A. the control of childhood and infectious diseases.

Explanation: Life expectancy began to rise due to better sanitation and education in the twentieth century

Answer 2

the correct answer is d