Which amendment guarantees that all powers not mentioned in the constitution belong to the states

How did testimony such as this from the triangle shirtwaist factory disaster affect the workplace?

Which of these statements describes a long-term impact of european imperialism in africa? a. african countries joined together to present a united front against imperialism. b. europeans paid african countries after colonizing them, offering these new countries a fresh start. c. european powers drew the current borders, splitting ethnic groups among modern countries. d. africans became more loyal to their countries than to their ethnic groups.

What has been a long term effect on the panama canal