The message of this political cartoon is to alert people of British war crimes.

The correct answer is: B urge the repeal of the Stamp Act.

Explanation: Political cartoons from the time of the Stamp Act often depicted the negative effects of taxation without representation, rallying public sentiment against the Act. The imagery used typically serves to highlight the frustration and injustice felt by the colonists, advocating for its repeal. If you have further questions or need more assistance, feel free to ask!