Your company has been hosting a static website in an S3 bucket for several months and gets a fair amount of traffic. Now you want your website to make requests to another website (example.com) with a different domain name. The requests are unsuccessful in the browser. However, the website (example.com) works properly when the requests are not from your website. What could be the most likely cause of this disruption?

Answer options:

A.The new domain name is not registered in CloudWatch monitoring.
B.The S3 bucket has not been configured to allow Cross-Origin Resource Sharing (CORS).
C.The S3 bucket was not created in the correct region.
D.The domain name wasn’t registered with AWS Route 53 and therefore won’t work.

Correct Answer: B
Option B is correct. The S3 bucket has not been configured to allow Cross-Origin Resource Sharing (CORS). To keep your content safe, your web browser implements something called the same-origin policy.
The default policy ensures that scripts and other active content loaded from one site or domain cannot interfere or interact with content from another location without an explicit indication that this is the desired behavior.
Option A is incorrect. Enabling Cloudwatch doesn’t affect Cross-Origin Resource Sharing (CORS).
Option C is incorrect. The S3 region does not cause the issue.
Option D is incorrect. The domain can be registered with any online registrar, not just AWS Route53. The question also mentions that the website (example.com) works properly when the requests are not from your website.
References:
https://docs.aws.amazon.com/AmazonS3/latest/dev/cors.html
https://docs.aws.amazon.com/apigateway/latest/developerguide/how-to-cors.html
https://aws.amazon.com/blogs/aws/amazon-S3-cross-origin-resource-sharing/