Answer:
They use a primary source to show that a song was spreading the idea of equality across the Caribbean.
They use a primary source to show that some white people opposed the idea of freeing enslaved people.
Step-by-step explanation:
According to a different source, this question refers to the text Sugar Changed the World. This is the way in which the authors of the book use historical evidence. Primary sources are particularly important in a historical book, as these come from the time period that is being discussed. Because of this, primary sources allow us to better understand the time period as well as the pressures and motivations that encouraged people to have a particular perspective on the events being described.