What significance did the launching of a Soviet satellite have on the United States?

Question

The United States concentrated its efforts on the development of rockets.
The United States planned to eliminate high school to train soldiers to fight the Soviets.
The United States established new military bases around the world to thwart the missile gap.
The United States feared the bomber gap created by Soviet advances.
the third one?

Answer 1

I think its the fourth one

Answer 2

Both 3 and 4 are wrong.
That leaves you two choices. Check your text or Google Soviet satellite.

Please do not post this question again.