AWS CloudTrail Is Being Used to Monitor API Calls in an Organization

AWS CloudTrail is being used to monitor API calls in an organization. An audit revealed that CloudTrail is failing to deliver events to Amazon S3 as expected. What initial actions should be taken to allow delivery of CloudTrail events to S3? (Choose two.)

A) Verify that the S3 bucket policy allow CloudTrail to write objects.
B) Verify that the IAM role used by CloudTrail has access to write to Amazon CloudWatch Logs.
C) Remove any lifecycle policies on the S3 bucket that are archiving objects to Amazon Glacier.
D) Verify that the S3 bucket defined in CloudTrail exists.
E) Verify that the log file prefix defined in CloudTrail exists in the S3 bucket.