The correct answer is:
D. Mohandas Gandhi organized a civil disobedience campaign.
The Amritsar Massacre, which occurred in 1919 when British troops killed hundreds of Indian civilians, had a profound impact on the Indian independence movement. It galvanized public opinion against British rule and led to widespread outrage, ultimately influencing figures like Mohandas Gandhi to adopt and advocate for nonviolent civil disobedience as a means to challenge colonial authority.