Answer: It depends on what you mean because slavery is still alive today unfortunately in other countries. I'm assuming you mean African American slavery in the USA. Your answer would be from the 1600s - 1865. But at the same time, not every state started slavery at the same time. For instance, Georgia didn't start until the 1700s so it varies, but the first state was Massachusetts in 1619.
Georgia was the last colony to be established. It was formed as a debtor colony since there was an overcrowding of debtors in England, they moved to Georgia to work off their debt. This system to work off your debt was James Oglethorpe's idea and it failed.
The correct answer is B. 235.
Explanation
The anatomic bomb is a device of mass destruction used in warfare that gains its destructive force from nuclear reactions. One of its main characteristics is the formation of a mushroom-shaped cloud when it is detonated. Fissile isotopes, such as uranium-235 or plutonium-239, are necessary for its manufacture. Another important fact about atomic bombs is that they were first developed by the United States during World War II to avenge the attack on Pearl Harbor. Therefore, the correct answer is B. 235.
The complete sentence remains "To create the atomic bomb they needed uranium - 235 the most"
