What was the Persians' most unique cultural contribution? a. Zoroastrianism
b. library at Nineveh
c. chariot warfare
d. Hanging Gardens

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation:

number 4. should be the correct answer

the citation´s place is in position 4.

as carl becker

pointed out during the rise of european fascism after world war i

for democracy to prosper, it needs “a certain measure of economic security”

.

example (johnson 4)