Final answer:
The correct pilot action required while climbing into Class A airspace is to reset the altimeter to 29.92.
Step-by-step explanation:
The correct pilot action required while climbing into Class A airspace is to reset the altimeter to 29.92. Class A airspace is the highest level of airspace and is typically above 18,000 feet. In Class A airspace, all aircraft operate on a standardized altitude setting of 29.92 inches of mercury, regardless of the nearest station or current weather conditions. This ensures consistent altitude readings for all aircraft in the airspace.