Final answer:
King George III of Britain reacted to the Olive Branch Petition by ignoring it.
Step-by-step explanation:
King George III of Britain reacted to the Olive Branch Petition by a. Ignoring it.
The Olive Branch Petition was a final attempt by the Continental Congress to achieve reconciliation and peace with Britain before the colonies declared independence. However, the king rejected the petition and declared the colonies to be in rebellion, making any hopes of reconciliation impossible.