The answer is C. stress is always healthy and should be avoided. Eustress is known to be stress that the person reacts to in a positive way. It is a moderate or normal psychological stress interpreted as being beneficial for the experiencer. An example of Eustress, would be a challenging work assignment that is perceived to be neither too difficult nor too easy. Hope this helped :))
Subjective discomfort is when a person experiences displeasure and is unable to cope with certain scenarios or thoughts to the point where the displeasure can even manifest physically and take a toll on the body not unlike what Katherine experiences whenever she is about to leave her apartment.
Conservation helped to reduce air pollution by using fewer fossil fuels, such as gasoline for a car, reduces the emission of harmful pollutants into the air
