To the first question. Is there anymore to the question or is that all there is to work with?
True I think but don't take this the wrong way
Through is the preposition and window are the object, I believe.
If you want to create a parallel structure, you need to use the same form of the word throughout the sentence. So here, there are two adjectives, tall and quiet, meaning that the third word also has to be an adjective. Very mysterious, somewhat handsome, and well dressed are all adjectives, but will wear all black is not, which is why that is the correct answer.
Answer: c. exhaustive
Extra: it would be exhaustive if it includes all possible outcomes
