Which sequence most correctly forms the historical background of the Non-Cooperation Movement?

Correct answer: Wartime hardships → Rowlatt protest → Jallianwala Bagh → Khilafat → Non-Cooperation

The governing concept is chronological sequencing. The First World War caused economic and social hardships; the Rowlatt Act and protests intensified opposition; the Jallianwala Bagh massacre deepened public anger; the Khilafat issue then helped build wider unity; and the Non-Cooperation Movement followed in 1920. Therefore A is the only option with the correct progression. The other sequences place later developments before their causes.