On an average people in America who were born in 1900 ______.A.had a life-span of 74 year

On an average, people in America who were born in 1900 ______.

A．had a life-span of 74 years

B．lived a shorter but better life than those born later

C．lived to 47 years of age

D．lived 27 years longer than those born in 1981