A company recently launched its website to serve content to its global user base. The company wants to store and accelerate the delivery of static content to its users by leveraging Amazon CloudFront with an Amazon EC2 instance attached as its origin.
How should a solutions architect optimize high availability for the application?

A. Use Lambda@Edge for CloudFront. B. Use Amazon S3 Transfer Acceleration for CloudFront. C. Configure another EC2 instance in a different Availability Zone as part of the origin group. D. Configure another EC2 instance as part of the origin server cluster in the same Availability Zone.