Your team plans to deliver content to users by using the CloudFront service and an S3 bucket as the source. You need to ensure that a custom value is placed for the amount of time the object is stored in the CloudFront cache. Which 2 of the following options can be used to fulfill this requirement?

Answer options:

A.Configure the origin to add an Expires header field to the object.
B.Configure the Cloudfront distribution to add an Expires header field to the object.
C.Specify a value for Minimum TTL in CloudFront cache behaviors.
D.Specify a value for Minimum TTL in the origin object.

Answer – A and C
This is also mentioned in the AWS Documentation.
For web distributions, to control how long your objects stay in a CloudFront cache before CloudFront forwards another request to your origin, you can:
Configure your origin to add a Cache-Control or an Expires header field to each object.
Specify a value for Minimum TTL in CloudFront cache behaviors.
Use the default value of 24 hours.
Since this is clearly mentioned in the AWS Documentation, the other options are invalid.
For more information on request and response behavior for Cloudfront with S3, please refer to the below URL-
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/RequestAndResponseBehaviorS3Origin.html