The launch of Sputnik I intensified Cold War tensions and caused the

A.)United States to increase spending on technology with the Soviet Union

B.)Soviet Union to threaten nuclear attack against Europe

C.)United States to send military aid to East Berlin

D.)Soviet Union to move missiles to Cuba

On October 4, 1957, the Soviet Union launched the earth's first artificial satellite, Sputnik-1. ... As a result, the launch of Sputnik served to intensify the arms race and raise Cold War tensions. During the 1950s, both the United States and the Soviet Union were working to develop new technology.

Explanation:

So the answer is A

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.

la segunda guerra mundial comenzó el 1 de septiembre de 1939 y terminó el 2 de septiembre de 1945. ¡espero que esto ayude!