D. Unicellular
An organism made up of one cell is called Unicellular, though they can be complex as well.
Urinary Bladder : holds urine
■muscular ducts that connect kidneys & bladder
Ureter :
■hollow saclike organ connect to kidney
■transport Urine by peristaltic action from kidney to bladder
Urethra :
transports urine to the bladder to outside of the body
■narrow duct that connects to bladder
I think the answer is A. Simple Resolutions.
