A century ago, how many lived to, or past 100, within a population of 5 million

A．cash instead of check
B．wages that have kept up with inflation
C．new income records
D．wages that can push up economy

A．the aged should not go to the nursing home
B．we can lengthen our lives through high-tech medicine
C．centenarians die faster than those who arc younger
D．the ever-growing segment of centenarians has caused concern