What did the United States do after Sputnik was launched by the Russians?Answer Choices: A) Hydrogen bomb was tested in the Marshall IslandsB)...

The correct answer here is D.  None of the other ones is
possible.

The Soviet Union launched Sputnik in 1957.  When
the Soviets did that, it convinced the United States that the Russians had gotten ahead
in technology.  This was a problem because it might mean that the Russians could get
ballistic nuclear missiles before the US.  In the long term, it might mean that the US
would fall further behind the Russians in military technology.  As a way to combat this
potential problem, the US government started trying to improve scientific education.  It
also created NASA.

All of the other options you mention are
things that happened before Sputnik was launched.  They cannot possibly be effects of
Sputnik.