GMAT Critical Reasoning (CR) | The case of the American Revolution is generally regarded as the best

First of all, its a Good Question. It tricks you easily.

From the first look, its very tempting to choose A as the Answer. But if we just deconstuct the Question Stem logically, its very easy to spot the rightanswer.

Claim :- Socities can attain more benfit than harm from arevolution.

Evidence :- The case of the American Revolution.

Now, from the word "But" onwards ( But even the American Revolution.....) it talks about theEvidence for not being consistent .

Now, among the answer
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