Your organization had built a video sharing website on EC2 within the US for which the S3 bucket in us- east-1 is used to store the video files. The website has been receiving excellent feedback, and your organization decided to expand the website all over the world. However, customers in Europe and Asia started to complain that website access, upload, and download of video files are slow. How can you resolve the issue? (Select TWO)

Answer options:

A.Use CloudFront for improving the performance on website by caching static files.
B.Use VPC Endpoints in Europe and Asia regions to improve S3 uploads and downloads.
C.Enable Transfer Acceleration feature on S3 bucket which uses AWS edge locations to improve upload and download speeds.
D.Change your application design to provision higher-memory configuration EC2 instances and process S3 requests through EC2.

Answer: A, C
Option A is correct. AWS CloudFront can be used to improve the performance of your website where network latency is an issue.
https://docs.aws.amazon.com/AmazonS3/latest/dev/website-hosting-cloudfront-walkthrough.html
Option B is incorrect. VPC endpoints do not support cross-region requests. 
Limitations
Endpoints are supported within the same Region only. You cannot create an endpoint between a VPC and a service in a different Region.
Endpoints support IPv4 traffic only.
You cannot transfer an endpoint from one VPC to another, or from one service to another.
Option C is correct. Amazon S3 Transfer Acceleration enables fast, easy, and secure transfers of files over long distances between your client and an S3 bucket. Transfer Acceleration takes advantage of Amazon CloudFront’s globally distributed edge locations. As the data arrives at an edge location, data is routed to Amazon S3 over an optimized network path.
When mobile or web applications have users that are far from the destination S3 bucket, uploads and downloads may be slow. S3TA (S3 Transfer Acceleration) can help speed up these long-distance transfers to provide users a better experience. 
Option D is incorrect because it increases the cost of EC2 usage and does not solve the problem with slower upload and download speeds to S3.
For more information on transfer acceleration, refer to the documentation here.
https://docs.aws.amazon.com/AmazonS3/latest/dev/transfer-acceleration.html#transfer-acceleration-why-use
https://docs.aws.amazon.com/vpc/latest/privatelink/vpce-interface.html