Answer:
Primary source is more reliable, but writers tend to use both primary and secondary source.
The revolutionary war tested the inequality because slaves who participated in the war were granted freedom.
Egyptian priest-physician used powerful magic for which rituals, spells, incantations, talismans and amulets were used. Also used <span>carbohydrates from cereals, vitamins from fruit and vegetables, and proteins mostly from fish. Milk and milk products were just occasionally consumed, as were legumes, seeds and oil.</span>
In 1922, the U.S.-driven Washington Naval Conference resulted in the Nine-Power Treaty reaffirming the Open Door principles. In reaction to the Mukden Incident of 1931 in Manchuria and the Second Sino-Japanese War between China and Japan in 1937, the United States intensified its support of the Open Door Policy.
