how can you ensure that messages are delivered in order?

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In relation to Amazon SQS, how can you ensure that messages are delivered in order?

A.
Increase the size of your queue

B.
Send them with a timestamp

C.
Give each message a unique id

D.
AWS cannot guarantee that you will receive messages in the exact order you sent them

Explanation:
Amazon SQS makes a best effort to preserve order in messages, but due to the distributed nature of the queue, AWS
cannot guarantee that you will receive messages in the exact order you sent them. You typically place sequencing
information or timestamps in your messages so that you can reorder them upon receipt.
https://aws.amazon.com/items/1343?externalID=1343

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