Which statement correctly differentiates service ceiling from absolute ceiling?

Which statement correctly differentiates service ceiling from absolute ceiling?

• A. Absolute ceiling is the highest altitude at which the aircraft can maintain level flight.
• B. Service ceiling is the altitude at which stall occurs; absolute ceiling is where maximum speed is reached.
• C. Service ceiling is the altitude for best glide; absolute ceiling is where maximum speed occurs.
• D. Absolute ceiling is the altitude at which stall occurs.

Answer: (B)