In October 1962, American ships blocked Soviet ships carrying missiles from going into Cuba. The Soviets and Cubans agreed to take away the missiles if America promised not to attack Cuba. During the Cuban Missile Crisis, the Kennedy administration secretly agreed to remove the Jupiter missiles from Turkey in exchange for the withdrawal of all Russian nuclear weapons from Cuba. However, it is not decided if anyone "won". The USSR lost China's support over it.
b- decreased opportunities for entrepreneurs
The Industrial Revolution in the US increased opportunities for entrepreneurs. With new technology, there were more opportunities for people to create new businesses. In addition with new businesses being created there were connected, tangent businesses growing was well. For example, when the light bulb was invented it gave others the opportunity to create light fixtures, street lights, and film projectors.
I believe it to be B. I hope this helps -T<span />
The triple entente peace treaty