A. Modify the Condition operator to include both NotIpAddress and IpAddress to prevent unauthorized access to the S3 bucket.
B. Modify the Condition element from the IAM policy to aws:StringEquals instead of aws:SourceIp.
C. Modify the IAM policy instead of the bucket policy to restrict users from accessing the bucket based on their source IP addresses.
D. Change Effect from Allow to Deny in the second statement of the policy to deny requests not from the source IP range.