The correct option is B They wanted to spread liberal ideas across Europe.
In the Congress of Vienna, the European powers decided to restore the conservative regimes across Europe. They wanted to ensure that liberal ideas would not spread across Europe and restored the conservative Bourbon dynasty in France. The European powers also claimed that they were not proposing to go back to the days of the pre-revolutionary period and envisioned a new conservative order. They supported the establishment of a modern army, an efficient bureaucracy, a dynamic economy and abolition of feudalism and serfdom.