Which factor contributed to the collapse of command economies in communist countries are the end of the 20th centurya. they were unstable due to their reliance on constantly increasing stock pricesb. they were undermined by the huge differences between the rich and poor they createdc. they were much less efficient at producing goods than western free market economiesd. they were too focused on producing consumer goods instead of valuable new technologies

because its important to learn about other countries and how high tech they are compared to us. also its good to learn about other cultures and how ours differs and in common also we need to learn about companies that we still buy since they ship it here.

false the first governing document in the us history was the articles of federation

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.