The answer is B.
After many years of civil war, the Nicaraguan Revolution finally came to an end in 1990. As part of the peace agreement, both the Sandinista government and the Contras, as well as other minor organizations on both sides, agreed to lay down their weapons and allow for a peaceful transition of power.
One of the terms of the peace agreement was for Nicaragua to distance itself from the Soviet Union and its communist agenda. This was a significant turning point in the country's history as it marked the end of the Cold War that had been raging for decades. The Sandinistas, who had been supported by the Soviet Union during the civil war, agreed to allow democratic elections to decide the future leadership of the country. The Contras, who had been supported by the United States, also agreed to the terms of the peace agreement.