Answer: The best answer is C) Problem and solution helps the author show how Onesimus Mather solved the problem of his enslavement. The passage mentions that smallpox was spreading in Boston and that the colonists did not know how to prevent it. Onesimus Mather, who was enslaved, was able to share knowledge about a method to slow or stop the spread of smallpox. This suggests that the author is presenting a problem (the spread of smallpox) and a solution (Onesimus Mather's knowledge). This structure supports the author's purpose of showing how Onesimus Mather solved the problem of his enslavement by sharing his knowledge and making a significant impact on history.
Step-by-step explanation: