You are maintaining an application that is spread across multiple web servers and has incoming traffic balanced by ELB. The application allows users to upload pictures. Currently, each web server stores the image, and a background task synchronizes the data between servers. However, the synchronization task can no longer keep up with the number of images uploaded.

Answer options:

A.Store the images in Amazon S3.
B.Store the images on Amazon CloudFront.
C.Store the images on Amazon EBS.
D.Store the images on the ELB.

Answer – A
Option A is CORRECT because S3 provides a durable, secure, cost-effective, and highly available storage service for the uploaded pictures.
Option B is incorrect because the application needs just a storage solution, not a global content distribution service. CloudFront is also a costlier solution compared to S3.
Option C is incorrect because you cannot share EBS volumes ( can be done only for "io1" EBS volumes) among multiple EC2 instances.
Option D is incorrect because ELB cannot be used as a storage service.
For more information on AWS S3, please refer to the below URL:
http://docs.aws.amazon.com/AmazonS3/latest/dev/Welcome.html