The reason that china has about 30 million fewer females than males under the age of 20

female infanticide

Explanation:

In china they wanted the population to go down. Therfore making it so each family can only have one child. Most familys wanted to carry on their family name, so they kept the males. Getting rid of the females.

answer; the confederacy could afford to move a large number of prisoners hundreds of miles but could not afford to fee and house the prisoners;

answer; fair labor and standard act;