Please help me with this question

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.

Me and youin the summer of 1804, after meeting native americans for the first time, lewis and clark reached the eastern edge of

Why have some historians rejected the labels bc and ad as laels for periods in world history