Answer: I would say C. By noticing the way the author observes and interprets the world.
Explanation: We know the author speaks in first person through their speaking. You may hear them say “I didn't know then...” It's something we automatically know. To get to know them, we can look at how they observe & interpret the world. Do they have a negative view of the world? Did something happen to cause it? We can infer things about them through that. The main events that happen to them can be our evidence as to why they view or interpret the world the way they do. It's how we make an inference about them, such as they're a negative, dull person. And here's why...