Which task is a customer’s responsibility, according to the AWS shared responsibility model?

Explanations:

Customers are responsible for managing their guest operating systems as part of their applications and data.

Maintenance of the configuration of infrastructure devices is typically the responsibility of AWS.

Management of the host operating systems and virtualization is the responsibility of AWS, not the customer.

Maintenance of the software that powers Availability Zones is managed by AWS; customers do not handle this.