When someone uses Speak with Dead on a corpse, the spell says that you can ask the corpse up to five questions. Asking implies that the corpse can hear you.
What I want to know is whether or not the corpse's other senses are intact?
Could I show the corpse a picture and ask them to describe it?
Could I put a flower to a corpses nose and ask them to tell me what they smell?
Could I write down the five questions and get the corpse to read them?
The reason I am asking is because, during a session I was DMing, I ruled that the corpse could not read the scroll that the party was showing them. But after the session, the ruling I made felt unfinished. I need to make sure I took everything into account and didn't flub the ruling.