I WILL MARK AS BRAINLIEST. Which statement effectively summarizes "Mathematician Katherine Johnson at Work"? A. Katherine Johnson worked backwards, figuring out when and where spacecraft should launch based on when and where they were to land. B. Katherine Johnson was the only woman at NASA to be taken from the computing pool and placed with engineers. C. Katherine Johnson was a brilliant mathematician whose intelligence and hard work helped NASA missions succeed for over 30 years. D. Katherine Johnson worked on the mission to the moon and the space shuttle program at NASA.

it's A or D pick which one

Explanation:

guess between each two

B

Explanation:

definitely B for an answer

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.