The actions that caused many colonists to side with the Patriots, particularly among the options provided, would be killing innocent colonists in the western frontier and carrying out brutal attacks during the campaign in the Carolinas.
Both of these actions exemplified the violent oppression and aggression faced by colonists, which helped to galvanize support for the Patriot cause against British control and Loyalist activities. Specifically, the brutal methods used in the Carolinas during the Southern Campaign were particularly impactful in swaying public opinion toward the Patriots.