The purpose of pre-cleaning the dental operatory is to.. a) separate contaminated and uncontaminated waste. b) reduce the number of ­contaminated items in the treatment area. c) prevent debris, saliva, and blood from drying on instruments.

B.

All dentist equipment is used in the mouth. Many deseases, bacteria and viruses are transmitted trough saliva, and not all of these are weak. So, that is why we clean the dental operatory, to lower the chances of transmitting anything.

Hope it helped,

BioTeacher101

your answer is true

i am 100% sure

explanation:

i think that d. wind is the answer.   i missed the question when i answered a. currents.