The sensory registers RECEIVED INFORMATION FROM THE EXTERNAL WORLD.
The sensory registers takes information from all the five sense organs and hold the information only for a few seconds, maximum of twenty seconds. Sensory register is the most intermediate form of memory which one have and it is the shortest form of memory.
Cold blooded, lay eggs in water, and respire both by skin and lungs, and they have a three-chambered heart.
A difference between coelom and Pseudocoelom is that the gut of a pseudocoelom is surrounded by the endoderm, and the gut of a coelomate is surrounded by the ectoderm. So your answer is D.