Pretty sure it was Darwin... While most scholars didn't travel long distances at that time, Darwin did. he experienced in remote areas the diversity of life and evolution of a species.
The answer is D
Just did the topic test review on edgenuity
Amritsar massacre, took place on 13 April 1919 when troops of the British Indian Army under the command of Acting Brigadier-General Reginald Dyer fired rifles into a crowd of unarmed Indian civilians