What does the renal system consists of?

A.Two kidneys, two urethra, bladder, one ureter

B.Two adrenal glands, two kidneys, one ureter, two urethrae, bladder

C.Two adrenal glands, two kidneys, two ureters, two urethrae, bladder

D.Two kidneys, one urethra, bladder, two ureters

正确答案：Two kidneys, one urethra, bladder, two ureters