<span> Was a South African </span>anti-apartheid revolutionary,politician<span>, and </span>philanthropist<span>, who served as </span>President of South Africa<span> from 1994 to 1999. He was the country's first black head of state and the first elected in a </span>fully representative<span> democratic election.</span>
Answer: B
European states entered into military alliances with each other that forced them to come to their allies’ aid in the event of conflict with a nonallied state.
Explanation:
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Eli Whitney is credited with putting the concept of using mass-produced interchangeable parts into practice. He came up with this concept during a war, when he used these parts to create guns.