In October of 1957, the Soviet Union shocked the United States by refusing to build missiles. testing the first hydrogen bomb. increasing their defense spending. launching the satellite Sputnik I.

launching the satellite Sputnik I.

Explanation:

In October of 1957, the Soviet Union shocked the United States by "launching the satellite Sputnik I."

This is evident in the fact that the Soviet Union on the 4th of October 1957, launched the first-ever earth's first artificial satellite. The name of the satellite is Sputnik I. It brings more intensity to the arms race and cold war between the Soviet Union and the United States

Hence, in this case, the correct answer is "launching the satellite Sputnik I."

Its D

Explanation:

cur

explanation:

cancer