Narrator feels saddened because "A flow of disappoint rushed across my mind." The creature felt amused because "He came straight up to me and laughed into my eyes."
Hope this helps, if you have any other questions please do ask :)
I narrowed it down to B and D. Going to say D though
Answer:
Make sure your house is sealed up tight.
Use a smart thermostat.
Make sure your exhaust fan is working properly.
Turn off your appliances and electronics when you leave.
Set the hot water heater to a lower temperature
