The answer is "she" -- which was "heo" in Old English. (He, me, and we have all been relatively unchanged since the time of Old English.)
The answer should be the house is extremely old because the noises are trying to tell the house owner to fix it
using process of elimination you can eliminate condescending and pessimistic, and the passage doesn't really seem humorous either so your left with enthusiastic. The author seems to be happy and excited to share knowledge about how literature can make people feel, thus the best answer choice is probably enthusiastic
