6A: Which of the following was the most significant economic factor in the sixteenth-century Europe that led to the exploration of North America? O Inadequate labor supply in European factories O Agricultural surplus in the North American colonies O Underpopulation of the European nations O Expansion of trade between Old and New World​

Why was the battle of gaugamela an important turning point in alexanders conquest of persians empire

Ahistorian is writing a book about british prime minister winston churchill. she claims that churchill was one of the earliest british leaders to realize that nazi germany was a serious threat to british security what is the best way to determine whether the historian's interpretation is valid? o a. review primary sources to see if churchill ever recorded his opinions of nazi germany. o b. find out whether the historian has written any other books about british leaders. c. analyze secondary sources summarizing the effects of nazi germany on great britain. o d. cite the historian's book in another study about important 20th- century world leaders.

Which events are correlated but do not necessarily have a causal relationship?