Stress is a. positive or negative, depending on circumstances b. a body's automatic physical response c. a negative reaction to outside influences d. a and b only

Stress is positive or negative depending on the circumstances and a negative reaction to outside influences.

Stress is A and B, positive or negative depending on the situation and your body’s automatic physical response to something

I hope this helped! :-)

Well, l think that some effective communication is, emotional barriers and lack of attention, interest distraction or irrelevance. also some physical disabilities such as hearing problems or speech difficulties.      l hope i am correct  and you good luck.