Suppose that americans in 1786 had wanted to amend national law to include slavery. which situation best describes how this might have been achieved?
a) all of the states would have to agree to the amendment.
b) 9 out of 13 states would have to agree to the amendment.
c) 7 out of 13 states would have to agree to the amendment.
d) a simple majority of states would have to agree to the amendment.

All of the states would have to agree to the amendment this statement best describes how that might have been achieved.

Option A  

Explanation:

Keeping in mind that the US Constitution was drafted and approved in the year 1787, and that is why during the year 1786, Articles of Confederation were in force, which states that states are empowered to change legislation. So, in the year of 1786 America, in order to make any amendment to any kind of law it was required for all the states to be in favor of it. Therefore all states have to abide by the same and had to agree to include slavery in the national law.

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explanation:

lincoln won 212 electoral votes to mcclellan's 21 votes, and lincoln beat mcclellan. is the main reason lincoln won in 1864.