Which statement accurately describes the relationship between the cabin pressure controller and the altitude regulator?

Which statement accurately describes the relationship between the cabin pressure controller and the altitude regulator?

• A. The cabin pressure controller varies cabin altitude; the altitude regulator limits the maximum altitude.
• B. The altitude regulator varies cabin altitude; the cabin pressure controller limits the maximum altitude.
• C. Both regulate the same parameter.
• D. Neither has any effect.

Answer: (A)