This question asks what the passage as a whole establishes about the reach of the Non-Cooperation Movement, so each option needs to be checked against the specific evidence the passage lays out, not just its general tone.
Weighing the evidence this way, only option C survives: the passage's own description of nationwide, cross class participation shows the movement had the sympathy of the majority, so the correct answer is option C.
The phrase poor dumb millions has two separate words doing work, poor and dumb, so it helps to test what each option does with both parts rather than judging the phrase as a whole.
Since only option D accounts for both components of the phrase together, the correct answer is option D.
Each option here makes a specific factual claim, so the fastest way to check it is to match it against the exact detail in the passage it would need to be true.
Only option C is directly stated in the passage's own words, so the correct answer is option C.
A main idea question needs an option that sums up the whole passage, not just one paragraph of it, so each choice should be checked against the passage's overall thesis, not a single detail.
Since option B is the only claim that spans the passage's evidence about students, peasants, workers, and ordinary people discovering their own political capacity, the correct answer is option B.
Communalism is a word that carries a specific meaning in Indian political and historical writing, different from its everyday English sense, so the options should be checked against that specialised usage.
Given the passage's own framing around communities and their unity, communalism is being used in its standard historical sense of religious identity, so the correct answer is option A.