Final answer:
King George III responded to the Olive Branch Petition with a dismissal of the Colonies' requests, declaring war instead.
Step-by-step explanation:
King George III's response to the Olive Branch Petition in 1775 was option B. He responded with a dismissal of the Colonies' requests. The Olive Branch Petition was a final attempt by the American Colonies to avoid a full-scale war with Britain by reconciling their differences peacefully. However, King George III rejected the petition and instead declared the Colonies in rebellion, leading to the escalation of the American Revolutionary War.
Learn more about King George III's response to the Olive Branch Petition