What is a cause of the red scare

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.

Which of the following statements is true about germany's use of u-boats?

Without george washingtons invention, what aspect of life most likely would be impacted