Which solution will require the LEAST amount of effort?

A company has multiple AWS accounts, for various departments. One of the departments wants to share an Amazon S3 bucket with all other department.

Which solution will require the LEAST amount of effort?
A . Enable cross-account S3 replication for the bucket
B . Create a pre signed URL tor the bucket and share it with other departments
C . Set the S3 bucket policy to allow cross-account access to other departments
D . Create IAM users for each of the departments and configure a read-only IAM policy

Answer: C

Explanation:

https://docs.aws.amazon.com/AmazonS3/latest/dev/example-walkthroughs-managing-access-example2.html