Is this an actual question?
Communication barriers can be physical disabilities such as hearing problems or speach problems but it can also be the lack of interest, attention differences in viewpoint etc.
Answer:The awnser is B nurses because they are in there the most taking care of them I know because my grandma used to be a physc nurse and she would get hurt sometimes
They shouldn't speed up, because they could misread paper work or risk giving the wrong medication.