Question

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.

Answer 1

The correct answer is option D.   The Soviet Union shocked the United States by launching the satellite Sputnik 1.  This mission was a huge success and appreciated throughout the world.   This caused fear in the minds of the US government which began to think that USSR had stronger nuclear capabilities than the USA.

Answer 2

Solution:

Last option will be the right answer.

In the October 1957, Soviet Union really shocked the United States while launching its satellite named Sputnik I.

While launching its own satellite, it really lowered the Central power of the US.

It was highly linked to the national Educational research being taking place.