Who where the first peoole to arrive in early america

Did the west show signs of cultural decline in the 20th century?

Plz ive been stuck on this question forever. in 1753 george washington was sent on a mission to a. build a fort at the point where the allegheny and monongahela rivers form the ohio river. b. attack the french at fort duquesne. c. attack the french at fort neccessity. d. deliver a message to the french demanding that they leave the ohio river.

World war 2 was caused, in part, by which of these factors?