Question 19
The Congress system of diplomacy in the early nineteenth century differed most strongly from the
diplomatic arrangements in Europe during the period between the peace of Westphalia and the French
Revolution in that members of the Congress system
a. were dedicated to spreading a single form of Christianity throughout Europe
b. sought to prevent any one state from becoming overly powerful
C. were largely in favor of dismantling tariffs and other trade barriers between European states
d. were explicitly committed to intervening in other states to preserve existing regimes

The congress system of diplomacy differs during the two period differs because its main aim is to prevent any one state from becoming overly powerful

The Congress System entails international effort which strives to maintain peace and stability in Europe by having a regular congresses among its Great Powers.

The Peace of Westphaliai is a peace treaties signed in the Westphalian cities and recognizes the full territorial sovereignty of the member state during the Roman Empire while French revolution was to done to get rid of the French monarchy that the people see as being corrupt.

However, the congress system of diplomacy differs during the two period differs because its main aim is to prevent any one state from becoming overly powerful.

Therefore, the Option B is correct.