In many cities, wastewater travels through sewer lines to be processed at a wastewater-treatment plant. the treatment plant uses many methods to break down materials in wastewater and make sure materials are safe before release. which of the methods used during treatment is meant to promote the growth of bacteria so they can break down materials in wastewater?
a. burying of solid waste
b. heating of liquid waste
c. aeration of liquid waste
d. settling out of solid waste

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." 

Choosing clothing that is appropriate for the environment and type of exercise mark brainlist if it you