A company will deploy an application on multiple Amazon EC2 Nitro-based instances in the same Availability Zone and needs the application to write to the same block storage volumes from multiple EC2 Nitro instances simultaneously for higher availability. Which solution meets these requirements?

The correct answer is Provisioned IOPS SSD (io2) EBS volumes with Amazon EBS Multi-Attach. Amazon EBS Multi-Attach allows multiple EC2 Nitro-based instances in the same Availability Zone to concurrently attach to a single io2 Block Express volume. This provides shared block storage for high availability. io2 Block Express volumes are designed for high-performance, mission-critical applications that require high IOPS and throughput, making them suitable for this use case. General Purpose SSD (gp3) and gp2 EBS volumes do not support Multi-Attach. Throughput Optimized HDD (st1) EBS volumes also do not support Multi-Attach and are not designed for the high-performance, low-latency requirements typically associated with shared block storage for applications needing high availability.