What was one negative effect of the end of communism in czechoslovakia?

At the beginning of the war, why was hitler allowed to continue his aggression without resistance from other european countries

What event ensured england safe passage to colonize north america? a) many englishmen desired more religious freedom than the king allowed.b) england's government decided to take advantage of america's wealth of resources.c) england's defeat of the spanish armada in 1588 opened up the seaways.d) cabot claimed the north atlantic coast for england in 1497.

What from the columbian exchange had perhaps the biggest impact on the world?