1. He is Primary exponent of the impressionist movement and the focal point for other impressionist composers. Who changed the course of musical development by dissolving traditional rules and
conventions into a new language of possibilities in harmony, rhythm, form, texture, and color.

This sounds like a personal reflection on something you did. it is asking the hardest part, or a part you may have struggled with on an informal interview you must have done. it is also asking advice you'd give someone else for the process of completing an informal interview, so you should write something that would . for example, maybe the first thing they should do, something they should include.

Iwould go with a or d would be your answer

Well if some words are like big you could say enormous .just make them sound more egxarreted