A company runs a stateful production application on Amazon EC2 instances. The application requires at least two EC2 instances to always be running. A solutions architect needs to design a highly available and fault-tolerant architecture for the application. The solutions architect creates an Auto Scaling group of EC2 instances. Which set of additional steps should the solutions architect take to meet these requirements?

• ASet the Auto Scaling group's minimum capacity to two. Deploy one On-Demand Instance in one Availability Zone and one On-Demand Instance in a second Availability Zone.
• BSet the Auto Scaling group's minimum capacity to four. Deploy two On-Demand Instances in one Availability Zone and two On-Demand Instances in a second Availability Zone.
• CSet the Auto Scaling group's minimum capacity to two. Deploy four Spot Instances in one Availability Zone.
• DSet the Auto Scaling group's minimum capacity to four. Deploy two On-Demand Instances in one Availability Zone and two Spot Instances in a second Availability Zone.