You are given a paragraph, a question and some answer options (associated with "A", "B", "C", "D", etc.) You need to list all the correct answer options with their associated letters (e.g. "A" can be a valid answer). Note that sometimes, more than one option can answer the question correctly and completely. In those cases, please generate all such options separated by a comma (e.g. "A, B" is a valid answer). Do not generate anything else apart from one or more of the following characters: 'A', 'B, 'C', 'D', etc.
Q: Paragraph- Sent 1: Fact: I wasn't dead.
Sent 2: After I realized this, I left my quarters.
Sent 3: The lightscreen provided had informed me when and where official meals were taking place, but I hadn't bothered to acknowledge the invitations.
Sent 4: It hadn't seemed relevant, somehow, given that I was still reeling over the explosion, the deaths of my crewmates, and the rescue.
Sent 5: I've heard there are a number of stages of grief and shock; I guess I was working my way through them.
Sent 6: Food was delivered to my quarters.
Sent 7: Initially, I couldn't figure out why—I hadn't requested any be sent.
Sent 8: Then I realized, someone must have noticed I hadn't left, and was nice enough to send food my way.
Sent 9: The accompanying bottle of wine was a nice touch.
Sent 10: I must have consumed it, too, because later on, the plates and the bottle were both empty.
Sent 11: I spent a lot of time lying on my back on the bed, staring up at the little etched swirls in the ceiling, or slumped in the old-fashioned armchair, staring out the windows at the stars.
Sent 12: I did a lot of staring and not moving.
Sent 13: Man, was it good to be done with that stage.
Sent 14: It was time to find out what hell looked like. 
Question: What the person couldn't figure out? (A) Why the food was delivered to their quarters (B) Why food was sent (C) Why he was sad.
A: 
A, B.