What was the most significant result of the 1957 launch of Sputnik? U.S. military troops were deployed to Korea. B The United States ended its involvement in the Vietnam War. C A space race between the United States and the Soviet Union began. D The U.S. government implemented the Marshall Plan.

## Step 1<br />The question is asking for the most significant result of the 1957 launch of Sputnik. Sputnik was the first artificial satellite to successfully orbit the Earth. It was launched by the Soviet Union on October 4, 1957.<br /><br />## Step 2<br />The launch of Sputnik had a profound impact on the United States. It sparked the beginning of the space race between the United States and the Soviet Union. This was a period of intense competition between the two superpowers, as each sought to outdo the other in space exploration.<br /><br />## Step 3<br />The other options provided, such as the deployment of U.S. military troops to Korea, the end of U.S. involvement in the Vietnam War, and the implementation of the Marshall Plan, are not directly related to the launch of Sputnik.