Which of the following would an IS auditor consider a weakness when performing an audit of an organization that uses a public key infrastructure with digital certificates for its business-to-consumer transactions via the Internet? 
A、Customers are widely dispersed geographically, but the certificate authorities are not. 
B、Customers can make their transactions from any computer or mobile device. 
C、The certificate authority has several data processing subcenters to administer certificates. 
D、The organization is the owner of the certificate authority.