In the ancient world, why did civilizations flourish around great river valleys? A) River valleys protected citizens from natural disasters.
B) River valleys provided an ideal environment for agriculture.
C) River valleys sheltered citizens from harsh weather.
D) River valleys contained vast mineral resources.

B) River valleys provided an ideal environment for agriculture

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B or D depends on point of view

Explanation:

jim crow law, in u.s. history, any of the laws in which racial was enforced, in the south between the finish of reconstruction in 1877 and the start of the social liberties development during the 1950s.

jim crow was the name of a minstrel routine( jump jim crow) performed starting in 1828 by its creator, thomas dartmouth ("daddy") rice, and by numerous imitators, including on-screen character joseph jefferson.

the term came to be a defamatory sobriquet for african americans and an assignment for their segregated life. the segregation rule was stretched out to parks, graveyards, theaters, and eateries with an end goal to keep any contact among blacks and whites as equivalents.

it was classified on neighborhood and state levels and most broadly with the "separate yet equivalent" choice of the u.s. preeminent court in plessy v. ferguson (1896).

women should have the same rights as men