Amazon S3 is the default storage service that should be considered for companies. It provides durable storage for all static content.

Explanation:

• Amazon S3 (B) is the correct choice because it's designed for storing large amounts of unstructured data like photos and videos, provides high durability and availability, and can serve static content directly to users.
• Amazon EBS volume (A) is block storage attached to EC2 instances, not suitable for storing and serving static content across a highly available web application.
• Amazon EC2 instance store (C) is ephemeral storage that's tied to a specific EC2 instance and loses data when the instance stops or terminates.
• Amazon RDS instance (D) is a managed relational database service, not designed for storing large binary files like photos and videos.

For more on AWS S3, please visit: https://aws.amazon.com/s3/