In 1976, a historian is writing a book analyzing the causes of the american revolution, which was fought 200 years earlier. which of the following sources would be a primary source he could consult?

a. a book on the revolution written by a famous american historian in the late 1800s

b. a well-known american history textbook used in schools throughout the country

c. a letter from an american soldier describing why he supported the american revolution

d. an award-winning documentary describing competing theories on the revolution's causes

i hope this

explanation:

max weber's 3 types of authority. the sociologist and philosopher  max weber  distinguishes  three types of authority—charismatic,  traditional  and legal-rational—each of which corresponds to a brand of  leadership that is operative in contemporary society.

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.