How should the role of the Non-Cooperation Movement in expanding mass nationalism be best understood?

Correct answer: It brought different classes onto a common platform of anti-colonial protest

The Non-Cooperation Movement broadened nationalism beyond a narrow educated elite. Students, teachers, merchants, peasants, workers, religious groups and many urban and rural communities participated through boycotts, demonstrations, resignations and constructive work. Their actions differed in purpose, but opposition to colonial rule gave them a shared political language and platform. Thus option A is correct; the other choices deny the movement’s mass character.