What was the main reason for the rise of nationalist feeling after Jallianwala Bagh?

Correct answer: People saw the cruelty of colonial rule more clearly

The governing concept is colonial repression and the growth of anti-colonial nationalism. The Jallianwala Bagh massacre, in which peaceful and unarmed people were fired upon, deeply shocked Indians. It exposed the violent character of British rule and weakened faith in British justice. Therefore, public anger, protest, and national unity increased. Option B is false because the British did not declare complete swaraj; option C reverses public opinion about the Rowlatt Act; and option D has no connection with the massacre.