Answer:
I am pretty sure it's D.
Explanation:
a short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body.
it often supply energy and other nutrients and fiber that the body needs.
Option C would be correct. The organ system can plays many parts at one time. Also, it is the only system listed.
Hope this helps!
A is the ans for this question