Answer:
A.alteration is the answer of this question
What this excerpt reveals about the narrator of the story is that <u>i</u><span><u>t describes what the narrator experiences in the story.
</u>The narrator is visiting his old friend in his creepy mansion where his sister died and came to life. So for a couple of days, they didn't talk about her death at all. <u>
</u></span>
This sentence is complex because it contains both a dependant and an independent clause. Do not be fooled by the addition of "however" or the length of the sentence.
If you need reasoning, here you are:
Simple: has one independent clause
Compound: has two independent clauses (either joined by a coordinating conjunction or a semicolon)
Complex: contains a dependant and an independent clause
Compound-Complex: Contains at least two independent clauses and one dependent clause
Hope this helps! If you have any questions about what any of the words that I used in my explanation mean (such as an independent clause and a dependent clause), feel free to ask.