Line executives are individuals in the direct chain of command who are responsible for achieving the core objectives of an organization. They have authority over subordinate personnel and direct responsibility for organizational results. They differ from staff personnel, who provide advice or support but do not directly manage line functions.

Management (A) is a broader term that includes both line and staff.

Authorized directives (B) are formal instructions, not people.

Stockholders (D) are owners, not organizational authorities.