It's either going to be A or B because a C is talking about interviewing one person and D doesn't make sense because what happens if you can't here the radio clearly or it might keep going in and out
Answer:
the letter D. its really obvious
A. Gloomy
This is because if you read it, it is definitely not bittersweet. Ravens are signs of death and this is not murderous because no one is really getting murdered, its just the gloomy feeling of not knowing and how it is constantly happening.