Which correctly lists structures of the urinary system?

Two kidneys. This pair of purplish-brown organs is located below the ribs toward the middle of the back. ... Two ureters. These narrow tubes carry urine from the kidneys to the bladder. ... Bladder. ... Two sphincter muscles. ... Nerves in the bladder. ... Urethra.

You have to put what were supposed to solve out here

The answer would be d. most contraceptives are effective when used properly

The answer you're looking for is washing your hands. "at this late date, we all expect our doctors to wash their hands before examining us or performing an operation in order to prevent the spread of infection. surprisingly, physicians did not begin to acknowledge the lifesaving power of this simple act until 1847.it was then that dr. semmelweis began exhorting his fellow physicians at the famed vienna general hospital (allgemeines krankenhaus) to wash up before examining women about to deliver babies. his plea was far more than aesthetic; it was a matter of life and death and to prevent a deadly malady known as “childbed” or puerperal (from the latin words for child and parent) fever."