How have airplanes changed the way the world does business? check all that apply. by making long trips less expensive by making long trips in less time by opening up new trade markets by increasing hiring opportunities by increasing travel options

As nina and erin were eating lunch in the central high school student cafeteria, they were discussing the news coverage about the girls' athletic coach being arrested for selling steroids to student athletes. "i think the guy just did it because they don't pay teachers enough money," nina suggested. "i bet the guy had some other kind of drug addiction he was trying to pay for," erin countered. nina and erin's ideas about the cause of the coach's drug-selling behavior are examples of: