The forts in the ohio river valley that led to the start of the french and indian war were built by

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:

d is the answer hope this

c. the bill of rights clearly and definitively lists specific situations where rights can be limited.