Which of the following events served as the catalyst that started the chain of events that would lead to world war i?
a.
the german use of unrestricted submarine warfare
b.
the zimmermann telegram
c.
the assassination of archduke ferdinand
d.
the sinking of the lusitania

Which statement does not accurately describe the columbian exchange and its consequences? a. wheat became a major crop in north america where it had never existed before. b. millions of africans were kidnapped into slavery to provide labor for profitable crops. c. cattle, sheep, chickens, and pigs were brought to europe for the first time. d. spanish conquistadors brought diseases with them and native peoples begin dying.

Did president truman warn japan against a second bomb attack

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