Question

what happened when the czechs tried to implement liberal reforms in 1968?
the communist government was forced to step down.
slovakia protested and blocked the proposed changes.
the ussr and other warsaw pact nations invaded.
czechoslovakian residents gained new civil liberties.

Explanation:

In 1968, Czechoslovakia launched the Prague Spring with liberal - reform attempts. The Soviet - led Warsaw Pact countries saw this as a threat to the socialist bloc's unity and invaded Czechoslovakia to suppress the reforms. The communist government did not step down as a direct result of the reforms. Slovakia was part of Czechoslovakia at the time and did not block the reforms in the way described. And the invasion led to the end of the hopes for new civil liberties.

Answer:

C. The USSR and other Warsaw pact nations invaded.