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An online education platform experiences lag and buffering during peak usage hours, when thousands of...

An online education platform experiences lag and buffering during peak usage hours, when thousands of students access video lessons concurrently. A solutions architect needs to improve the performance of the education platform.

The platform needs to handle unpredictable traffic surges without losing responsiveness. The platform must provide smooth video playback performance at all times. The platform must create multiple copies of each video lesson and store the copies in various bitrates to serve users who have different internet speeds. The smallest video size is 7 GB.

Which solution will meet these requirements MOST cost-effectively?

A.

Use Amazon ElastiCache to cache videos in all the required bitrates. Use AWS Lambda functions to process the videos and to convert the videos to the required bitrates.

B.

Create an Auto Scaling group that includes Amazon EC2 instances that are sized to meet peak loads. Use the Auto Scaling group to serve videos. Use the Auto Scaling group to convert the videos to the required bitrates.

C.

Store a copy of every video in every required bitrate in an Amazon S3 bucket. Use a single Amazon EC2 instance to serve the videos.

D.

Use Amazon Kinesis Video Streams to store and serve the videos. Use AWS Lambda functions to process the videos and to convert the videos to the required bitrates.

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