A．They beat the smartest people when they work together.
B．They give kids an access to all of the world's knowledge.
C．They could only interest children in seventh grade.
D．They meet people's most basic needs all over the world.
A．workers with a high-school diploma are less paid
B．degrees are closely associated with incomes
C．less-educated workers are living an insecure life
D．workers without a bachelor's degree can't get a premium today