While teaching a class two learners are constantly having difficulties with the material, and ask the instructor questions after every lecture. They are always the last two to finish any exercises…

While teaching a class two learners are constantly having difficulties with the material, and ask the instructor questions after every lecture. They are always the last two to finish any exercises. Many of the learners start noticing how frustrated the instructor is getting with the two learners, and comment on how the instructor's gestures are negative towards the two learners. Which of the following describes the correct non-verbal communication that the instructor should have in this situation?