Why would it not be correct to see the withdrawal of Non-Cooperation only as failure?

Correct answer: Because it brought people into politics and challenged the legitimacy of colonial rule

The correct answer is A because the success of a mass movement must be judged not only by whether it immediately achieved swaraj. Although Gandhi withdrew the movement after the Chauri Chaura incident to preserve its non-violent character, the campaign had already mobilised millions, spread political awareness, encouraged the boycott of colonial institutions and goods, and weakened the moral legitimacy of British rule. The other options contradict these outcomes.