10 free points have fun ahu bless nyself lol

Which of these statements best describes the ambiguity in this excerpt

European imperialism in the 19th century was largely motivated by a desire to: o a. assert power over other parts of the world. b. end the racist policies practiced in many foreign countries. o c. defend europe from aggressive foreign armies. d. relocate ethnic and religious minorities within national borders.

What event led to the progressive movement?