Help which one is the right answer

During what century did muhammad recieve his first revelation from god

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.

Plz- which of the following explains the growth of fundamentalism in the 1920s? -fundamentalism encouraged racial pride and inspired a "back-to-africa" movement. -americans were uneasy about rapid social change and supported traditional religious beliefs. -americans wanted to increase women's opportunities in the workplace following world war i.