They are called a literary letter or a epistle
B is the correct answer, they are 'targeting' their media, because they are searching for a specific audience, or looking for a target to pay the most attention to.
Okay, did you have a conversation with one of the higher people in your school? If you're uncomfortable report it to the office.
I would have to say B. But don't rely on this! Here is my explanation;
High-born would mean that he is more important or in a higher grade. In this text, he refers him to be high-born because he is rich and she loves him. He [not the high-born] Loves her so much, he is there when she is on the boat [or what he refers to], her death, and more places [I have not read this poem in a while].
Then again, don't rely on this answer! I did my best. It was either B. or C. to me. B. made more sense to me, but we are two different people!
The correct answer here is the exposition.
Narrative consists of several stages and parts like the exposition, climax, falling action and resolution just to name the few. Exposition in particular refers to the putting in, that is inserting, important background information. It is also called incluing and it is an important for worldbuilding.