Which among the following events took place immediately before the massacre at Jallianwalla Bagh?

Immediately before the Jallianwalla Bagh massacre on April 13, 1919, the British colonial government had implemented repressive measures through the Rowlatt Act, which allowed for the detention of individuals without trial. This led to widespread unrest and protests among Indians in Amritsar. On that day, thousands gathered at Jallianwalla Bagh to protest against these oppressive laws, which set the stage for the tragic and brutal military response by General Dyer.