Why did Rowlatt Satyagraha become a difficult national-level experience for Gandhi?

Correct answer: Violence occurred at some places and control became difficult in a nationwide protest

The direct answer is A: violence occurred in some places and control became difficult in a nationwide protest. The Rowlatt Satyagraha of 1919 opposed the Rowlatt Act, which allowed detention without ordinary trial safeguards. Gandhi called for a countrywide hartal and peaceful protest. Large numbers of people participated, showing the power of mass mobilisation. However, communication, discipline and control were difficult, and violence occurred in some places. This created a serious ethical and political difficulty for Gandhi, who insisted on non-violence. Option A is correct because it includes both mass scale and the problem of violence. Option B is wrong because the movement did have mass participation. Option C is absurd: it was an Indian anti-colonial protest, not a British celebration. Option D is wrong because Congress was not ended by it. The accurate lesson is that mass movements can create pressure, but they require discipline and non-violent conduct.