The most accurate response regarding the effect of the Amritsar Massacre on British colonial rule in India is: Indians began demanding India’s independence from British rule.
The massacre, which occurred on April 13, 1919, during a peaceful protest against repressive laws, significantly fueled nationalist sentiments and increased calls for self-rule and independence across the country. It highlighted the brutality of British colonial rule and played a crucial role in galvanizing Indian leaders and the populace towards seeking complete independence from British control.