Which battle proved to the french that the americans could win the revolutionary war

Look at this photograph taken during the battle of guadalcanal

What from the columbian exchange had perhaps the biggest impact on the world?

Which course of action did president carter propose in order to solve this problem for the next generation? a. contract with foreign nations to build wind turbines b. reduce federal spending on solar cell energy research c. drill fewer offshore wells to conserve marine life d. develop alternative energy sources