Soviet tanks rolled into Czechoslovakia in 1968 after an outbreak of A.
political violence against liberal reforms.

B.
terrorism against the Communist government.

C.
euphoria known as the “Prague Spring.”

D.
the execution of Imre Nagy.

C.

euphoria known as the “Prague Spring.”

Explanation:

because its important to learn about other countries and how high tech they are compared to us. also its good to learn about other cultures and how ours differs and in common also we need to learn about companies that we still buy since they ship it here.