According to the nationwide survey cited in the text,
a. the chart of the typical police organization is constricted in the middle, where the number of sergeants is outweighed by both line officers below them and the ranks of lieutenant, captain and major above them.
b. a typical police organization can be diagrammed by an inverted pyramid.
c. in a typical police organization, first-line supervisors outnumber managers in all other administrative positions.
d. none of the above.