Answer:
The best answer to the question: Which of the following actions by the British dealt a major blow to the moderates´ cause and allow radicals to take control of the Second Continental Congress? would be, A: the blockading of all major colonial ports by the British Navy as a result of the Prohibitory Act.
Step-by-step explanation:
The confrontations between the British and their American colonies, began way before the first organized Continental Army was formed. In militia-like groupins, Americans who had become tired of British tyranny, and of seeing that the British Crown would not step in in favor of its subjects, organized themselves in an attempt to start the Revolution for independence. Even though at Lexington and Concord the Continental Army finally began to organize under the command of George Washington, still there was not full support for independence, neither from the Continental Congress, nor from all of the colonials. However, when in 1775, King George III decreed the Prohibitory Act, with which the British Army was given power to block all access to any of the colonial ports, all colonists, both Loyalists and Rebels, began to suffer the consequences and the incomprehensible behavior on the part of the King. This was the final nail on the coffin and convinced almost all American colonists that the cause of independence was worth it. From then on, and with other factors, there was unanimous support to the cause of Independence.