D. You have to read each one out loud.
Ex:
A: Take these blankets and pile them with them over on the other side of the room. No, that makes no sense.
B: Take these blankets and pile them with those over on the other side of the room. Hm.. maybe lets look at more.
C. Take these blankets and pile them with these over on the other side of the room. Unless that person is pointing at the ones on the other side of the room, then that'll make sense.
D: Take these blankets and pile them with the ones over on the other side of the room This one is descriptive. Perfect! It's D!
Do you understand now?