Which statement best describes 'clear roles' in high-threat airspace management?

Which statement best describes 'clear roles' in high-threat airspace management?

• A. Each unit has defined responsibilities to prevent overlap and confusion.
• B. Roles are fluid and can be altered at any time with no notice.
• C. All units perform every task to ensure redundancy.
• D. Only the lead unit has authority; others follow.

Answer: (A)