What describes part of the columbian exchange? a. millions of asians died of disease. b. potatoes and tomatoes were introduced in the americas. c. people from africa were brought to the americas. d. horses and cattle went from the americas to europe.

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.

where is the subject? hahahaha