Which Three of the Following Statements About Domain Name Binding

Which three of the following statements about domain name binding to your OSS bucket are correct? (Choose three.)

A) Your customized domain name will be audited by Alibaba Cloud
B) your customized domain name need to be put on record in MIIT (Ministry of Industry and Information Technology)
C) the number of domain names you bind to one bucket can't exceed 20
D) mapping a domain name to your bucket endpoint is mandatory