After the engine starts, what action must ABSOLUTELY NOT be taken regarding the starter key? (Ref: VFR SOP Page 53)

• A) The key must not be turned to the 'BOTH' position.
• B) The key must ABSOLUTELY NOT be left in the 'START' position.
• C) The key must not be pulled to 'OFF' immediately.
• D) No force should be applied to the key.