The process of using techniques and procedures to help ensure that pathogens are not introduced into the body during an invasive procedure is called: a. decontamination. b. clean technique. c. sterile technique. d. aseptic technique.

d. Aseptic technique

Explanation:

During the medical procedures, aseptic techniques are used by the healthcare professionals in order to protect patients from infections by the harmful bacteria and other pathogens. Aseptic techniques involve the principles and processes that prevent contamination from the various types of pathogens. These techniques are used in clinics, surgery rooms and other health care related service points. Aseptic techniques involve the following activities -

your answer is "the 1950's"

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.