Jamestown was founded by the Virginia Company in 1607. Jamestown is significant because

The Virginia Company was founded as a joint stock company in order to establish colonial settlements in North America. They sent an expedition led by John Smith to create Jamestown in 1607. Historical Significance: Jamestown was the first permanent, stable English settlement in North America.

i think the answer is b.

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.