Answer:
The correct interpretation is:
The king treated the American colonists as unworthy of rights equal to those of British citizens by forcing them to fight each other.
Step-by-step explanation:
The grievance stated in the quote from the Declaration of Independence relates to the founding principle of "equality of all persons" by highlighting the unjust treatment of American colonists by the British monarchy. By forcing captive Americans to bear arms against their own country and become executioners of their friends and brethren, the king demonstrated a clear disregard for the equality of the colonists' rights. The act of forcing colonists to fight against their will and participate in acts of violence against their fellow Americans undermined the principle that all individuals should be treated equally and have the same rights and liberties. It showcased a blatant violation of the principle of equality and further fueled the colonists' desire for independence and the establishment of a system that upheld the rights and equality of all persons.