A "bad Nile" is a lack of water or too much water, so possible consequences include:
Famine (from crops dying)
Destruction of property (from flood waters)
and much more. However, this type of question normally references something in the text, so I suggest checking that section to see if a specific example was ever given.
its because the traits mix when two animals reproduce together and sometimes babies are born with small defects that are unnoticeable and when they reproduce that defect could get amplified
Effects of the Crusades. Although the crusades failed to capture Jerusalem, they had several major impacts on Western Europe. They increased the authority of the king: Sometimes nobles died in battle without leaving an heir in which case the king got their land. Kings passed taxes to pay for the crusades.
My answer would be (B) because after slavery was abolished farmers didn't have as much help that was needed to harvest all the crops on the large amounts of land so sharecroppers were needed to help harvest them all.
So B
They helped improve the working conditions for women and children and the working class people.