Correct Answer: D
Establishing a GKE Autopilot cluster and enrolling it in the stable release channel is the recommended practice for a business-critical application. Autopilot clusters offer automatic scaling, management, and reliability, while the stable release channel ensures the cluster receives tested and stable updates, balancing reliability with up-to-date features.

Why not A, B, or C?

• A: Regional GKE standard clusters in the rapid-release channel may introduce instability due to frequent updates.
• B: Zonal GKE standard clusters require more manual management and lack the automation of Autopilot clusters.
• C: GKE Autopilot clusters in the rapid-release channel may not be ideal for critical applications due to potential instability from frequent updates.

References:

• Autopilot Mode
• Release Channels