Which happened after the soviet invasion of czechoslovakia?

On August 20, 1968, the Soviet Union led Warsaw Pact troops in an invasion of Czechoslovakia to crack down on reformist trends in Prague. Although the SovietUnion's action successfully halted the pace of reform in Czechoslovakia, it had unintended consequences for the unity of the communist bloc.

The Soviets replaced reform-minded Czech officials, that's all I know.

Ithink your answer is b