Aradio announcement advises people to boil their water before drinking it or cooking with it. which of the following best explains why a health services department would broadcast this announcement? a. it wants to prevent the spread of communicable diseases through contaminated water. b. it wants to regulate how water is used to ensure that it is not wasted. c. it wants to people prevent the spread of communicable diseases through contaminated food. d. it wants to people recover from an illness by drinking clean, safe water.