 Which group of people shares the most similarities with the group of patients in the mental institution, as they are described by the author?
Illustrated by Freas Miss Abercrombie, the manual therapist patted the old man on the shoulder. Miss Abercrombie smoothed her smock down over trim hips and surveyed the other patients working at the long tables in the hospital's arts and crafts shop. Through the barred windows of the workshop, rolling green hills were seen, their tree-studded flanks making a pleasant setting for the mental institution. The crafts building was a good mile away from the main buildings of the hospital and the hills blocked the view of the austere complex of buildings that housed the main wards. A tall, blond patient with a flowing mustache, put one more dab of paint on his canvas and stood back to survey the meaningless smears.
 A Kindergarten class
 A circus troupe  A disorderly mob  An artists' collective  A Kindergarten class