Who did the most to de-escalate or end the cold war out of these leaders?

ronald reagan
dwight eisenhower
margaret thatcher
nikita khrushchev
harry s truman
josef stalin
mikhail gorbachev

Brainliesttt asap!me : ) answer in your own words. what was the relationship between medieval theories about scientific reasoning and the kind of reasoning favored during the scientific revolution?

Before the civil war, the south’s economy was based on enslaved labor. large cities. immigrant workers. factories.

Complete the square for 3x2 - 12x = 9.