As Communism<span> in the Soviet Union and </span>Eastern Europe <span>began to collapse due to the revolutions taking place, pressure mounted on the </span>East<span> German authorities to open the Berlin border to the west. Thousands of Germans were escaping to the west through Hungary and the GDR was powerless to stop them.</span>
In Puerto Rico it was useful, in Cuba not so much. Cubans perceived the outcome as occupation and didn't want to have United States occupation in their country. Puerto-Ricans had a form of a civilian government with independence and Puerto-rican citizenship but the country belonged to US.
<em>B. North America.</em>
Explanation:
Christopher Columbus actually never explored North America. The first person to explore North America goes to John Cabot, although there are numerous studies on how vikings were actually the first ones to explore North America. John Cabot, also known as Giovanni Caboto, went exploring when he got sent by Henry VII, and found North America in 1497.