What does the renal system consists of?
选项：

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