Which factor most improved the exchange of information among countries?

Aging populations can be a problem for developed countries because a) there are fewer younger workers coming into the workforce. b) most older workers demand top-level pay and full benefits. c) many older people are skilled in manufacturing, not technology. d) younger workers cannot find jobs when older people work longer.

How did the environments in north america affect the development of america indian cultures in the period just before europeans arrived

What does president bush say could be the effects of not acting on his proposal