How old was muhammad when he began teaching about islam?

Ineed on 2-4 i want y’all to reply to this question so i can turn this into my teacher tomorrow

Which of the following best describes us involvement in the korean peninsula today?

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.