[Titi Wangsa Damhore]

I think, you mean something like this https://mirrors.edge.kernel.org/pub/

I honestly think, it would be more helpful if the term FTP was dropped from the question.

a website that lists files would be more accurate.

or maybe mention somewhere (not to be confused with the unencrypted ftp protocol).

[Titi Wangsa Damhore]

I am not satisfied with your answer.

The answer provided by the practice exam mentions “Publish the Route 53 entry as the FTP URL”

A link that starts with “https” is not an FTP URL.