【单选题】Most of us know about the phases of life which we label to parallel different age groups and life stages: childhood, adolescence, adulthood, and old age.
A.
Most of us know about the stage s of life so that we can tear off the labels from people in different age groups and life stages: childhood, adolescence, adulthood, and old age.
B.
Most of us know about the different life stages describe d according to different age groups: childhood, adolescence, adulthood, and old age.
C.
Most of us know about the same st a g es of life and we attach label s to people in different age groups and life stages: childhood, adolescence, adulthood, and old age.