Answer:
c. You can only change one person at a time.
Step-by-step explanation:
This is the statement that best describes the way in which Thoreau thought about social change. Thoreau believed that the way in which society was able to change was by each person doing a small part in motivating this change. In order for this to be achieved, people needed to be responsible for creating their own morality and acting according to these values, regardless of what the law said about it.