Reilly is a nursing assistant working with Hunter. Reilly didn't get a chance to read Hunter's chart before entering Hunter's room. Reilly introduces himself and says he is going to take Hunter's vitals. Hunter seems to understand but
is quiet. When Reilly turns away to get equipment, he keeps talking to Hunter to make him comfortable. He notices that
when he turns away from Hunter, Hunter waves his arms until Reilly is speaking directly face-to-face. Reilly looks at
Hunter's chart and brings in an interpreter for sign language. Which kind of communication barrier did Reilly
overcome?