Which of the following best explains why punch-card voting is no longer legal? a. punch cards cannot be printed in more than one language. b. voters did not completely punch through their cards, resulting in unreadable ballots. c. punch-card readers are extremely expensive, and so are unavailable in poorer districts. d. optical scanning devices proved to be much more reasonable and accurate.

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.