To maximize user satisfaction, you are asked to improve the performance of the application for local and global users. As part of this initiative, you must monitor the application endpoint health and route traffic to the most appropriate application endpoint. Which service will you prefer to use?

Answer options:

A.Amazon Global Accelerator
B.Amazon DAX accelerator
C.Amazon S3 transfer acceleration
D.AWS Direct Connect

Answer: A
Global accelerator is a networking service that utilizes AWS global network to optimize the “user to application” path. The performance benefits realized by the use of the Global accelerator can be tested using a speed comparison tool provided by AWS.
Global accelerator differs from S3 transfer acceleration and DynamoDB accelerator.
S3 transfer acceleration, accelerates the transfers of files to the S3 bucket by utilizing edge locations.
Fully managed DynamoDB Accelerator (DAX) is a highly available in-memory cache for Dynamodb.
Option A is CORRECT. Refer to the explanation above.
Option B is INCORRECT. Refer to the explanation above.
Option C is INCORRECT. Refer to the explanation above.
Option D is INCORRECT. AWS Direct Connect is an AWS offering that simplifies setting up dedicated network connectivity between AWS and on-premises infrastructure.
Reference: 
https://aws.amazon.com/global-accelerator/
https://aws.amazon.com/dynamodb/dax/
https://docs.aws.amazon.com/AmazonS3/latest/dev/transfer-acceleration.html
https://aws.amazon.com/directconnect/