Question

Although the fertility rate for women in the United States has declined in recent years to a value below replacement level, the United States population is still increasing because of lower average age at first marriage

A lower infant death rates
B increased longevity
C improved health care
D immigration E Submit

Answer 1

B) Increased longevity

Step-by-step explanation:

Couples getting married earlier in their lives will always result in a longer time in which they could have a kid. Being married and trying for kids longer gives more of a chance to have one and over that extended period of time all it takes is the right circumstances and any non-infertile couple could get pregnant. People also live longer today than they did years ago which would also be grounds for increased longevity.