Which of the following actions by the British dealt a major blow to the moderates' cause and allowed the radicals to take control of the Second Continental Congress?

British's action that dealt a major blow to the moderates' and allowed the radicals to take control of the second continental congress was: The British Army's decision to lay siege to Lexington and Concord

the siege began on April 19th, after the Militia that surrounds the Massachusetts communities blocked all possible land access to Boston