Why did king ferdinand and queen isabella hesitate until 1492 to fund columbus’s voyage?

Sole i will mark brainlist to who answer

How did the voting rights act and the 15th amendment combine to improve individual rights for african americans

Which source would best a historian understand the effect of the great chicago fire on families? a. a biography of a chicago family displaced by the fire b. a letter from a grandmother in new york to her family in chicago c. a newspaper editorial about families who were displaced d. an oral history dictated by an adolescent who fled the fire