The cost-benefit principle states that
an action should always be taken if, and only if, the cost outweighs
the benefit.
OB) the benefits of an action are worth it, no matter the cost.
og an action should be taken if, and only if, the benefit from taking it is
greater than the cost.
OD
the cost of an action is only worth the benefit if more than one
million people will benefit.

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.

it was douglas macarthur..