Final answer:
Patrick Henry claims that fighting for freedom is a holy cause, suggesting that with divine support and the moral strength of their cause, the colonists are invincible.
Step-by-step explanation:
In the excerpt from Patrick Henry's "St. John's Church" speech, Henry is claiming that fighting for freedom is a holy cause (B). He highlights the invincibility of the three million people who are armed in the cause of liberty, suggesting that with their country and their God on their side, they cannot be defeated by the enemy.
Henry does not suggest that colonists are immortal (A), but he speaks to the moral and spiritual strength provided by their cause and divine support.
While he suggests that they will have friends to help fight their battles (C) and hints to the power of being vigilant, active, and brave (D), the core claim is that their fight for freedom is righteous and blessed by God.