The answer is c the support guves the information
I believe it would be a soliloquy. A soliloquy is defined as a person speaking to themselves without any regard for someone that may hear it (or oblivious to them).
D. maybe because it characterizes him
You don't have to answer what I answered
Advantages:
The author is closer to the age of their audience, which makes it easier to make content that is relatable to them.
Disadvantages:
The author might not be as experienced in their writing, which could potentially make the writing confusing to the reader.