Some customers have reported receiving an untrusted certificate warning when visiting the company’s website. The administrator ensures that the certificate is not expired and that customers have trusted the original issuer of the certificate. Which of the following could be causing the problem?
A. The intermediate CA certificates were not installed on the server.
B. The certificate is not the correct type for a virtual server.
C. The encryption key used in the certificate is too short.
D. The client’s browser is trying to negotiate SSL instead of TLS.