A Company Is Designing a New Web Application That the Company

A company is designing a new web application that the company will deploy into a single AWS Region. The application requires a two-tier architecture that will include Amazon EC2 instances and an Amazon RDS DB instance. A solutions architect needs to design the application so that all components are highly available. Which solution will meet these requirements MOST cost-effectively?

A) Deploy EC2 instances in an additional Region. Create a DB instance with the Multi-AZ option activated.
B) Deploy all EC2 instances in the same Region and the same Availability Zone. Create a DB instance with the Multi-AZ option activated.
C) Deploy EC2 instances across at least two Availability Zones within the same Region. Create a DB instance in a single Availability Zone.
D) Deploy EC2 instances across at least two Availability Zones within the same Region. Create a DB instance with the Multi-AZ option activated.