The correct answer is B. A majority of slaves in the colonies won their freedom.
Step-by-step explanation:
The Dunmore's Proclamation was a document signed in 1775 in the Colony of Virginia that aimed at encouraging the population, including slaves to support the Loyalist cause to avoid the independence of the colonies with the promise of providing former slaves freedom. Because of this, as a result of this document around 80,000 slaves escape and help the loyalist, while the Patriots and also slaves and non-slaveholding white population reacted by increasing their forces and creating mechanisms to stop slaves that could scape as they fear a rebellion. However, this document did not provide most of the slaves with freedom as most of the slaves that had escaped had to return with their masters and only around 300 were freed. Therefore, the one that was not a result of Dunmore's Proclamation is "a majority of slaves in the colonies won their freedom" because only a small percentage were freed while most slaves continue with their masters or returned after scaping.