The intended readers of the passage are

A．the kind of life that a person may expect to live
B．the mode of life that a group of people have lived
C．the length of time that a person or an animal has lived
D．the length of time that people may expect to live

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