The answer is C, body language. Body language is very important in communication. If you are in an interview and you're fidgeting...looking around the room...pacing....slouching....chances are you aren't going to get the job.
Civilian Health and Medical Program of the Veterans Administration (CHAMPVA)
A bacterial infection hope this helped
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.