Span of control refers to:
a. the number of individuals or resources that one supervisor can manage effectively during an incident.
b. an orderly line of authority that exists within the ranks of the incident management organization.
c. the process of moving the responsibility for incident command from one incident commander to another.
d. the act of directing, ordering, or controlling by virtue of explicit statutory, regulatory, or delegated authority.

A. The number of individuals or resources that one supervisor can manage effectively during an incident.

Span of control refers to The number of individuals or resources that one supervisor can manage effectively during an incident.

NOT:
B. An orderly line of authority that exists within the ranks of the incident management organization.
C. The process of moving the responsibility for incident command from one Incident Commander to another.
D. The act of directing, ordering, or controlling by virtue of explicit statutory, regulatory, or delegated authority.