Answer: a. even in that time, children and parents disagreed about what was best for the future.
Step-by-step explanation: In the given excerpt from "Robinson Crusoe" by Daniel Defoe, we can see the description of how the speaker wanted to be a sailor and going to the see, but his father wanted him to study law, despite his father's will, he decided to do what his was really passionate about. So in this excerpt we can see that even in that time, children and parents disagreed about what was best for the future.