D) less socially stratified
The is part of the labor force: the total group of people who either are working or who are looking for a job and who would like to and can work.
She cannot be part of the US debt, as debt is not a person or a group of people: it's the state of owing money to someone else.
Bradley is watching his twin daughters play on a playground seesaw, and is fascinated by the way only one side can be up or down at a time. He thinks about color vision, and recognizes that this is similar to how the opponent process theory describes his ability to see just one color of a color-pair at a time.
C. WEB DuBois was a civil rights leader who was the first African American to earn his Ph.D from Harvard.
Answer:
B. common cold and influenza
