The most significant factor that led large numbers of nomadic hunters to enter the heart of north america was
a) the domestication of horses
b) global warming
c) population growth
d) rising water levels
e) a mass extinction of large mammals in europe

Option:(E)- It is the best choice to choose from the given five.

Explanation:

They were the people who were basically dependent upon foraging(searching for wild food resources) in different areas around the globe. As due to a mass extinction of large mammals in Europe, they dislocated around the globe in order to search food.

the alfred thayer mahan award for literary achievement is awarded each year by the navy league of the united states. the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation. presented since 1957, "this award for literary achievement is awarded to a u.s. navy officer, u.s. marine corps officer, enlisted service member, or civilian who has made a notable literary contribution that has advanced the knowledge of the importance of sea power in the united states."[1]