A Provider administrator deploys VMware vCloud Usage Meter and attempts to add a vCenter instance for metering purposes. This error is generated:

There was a problem checking the certificate for vcenter.corp.local:443. Unable to connect with vcenter.corp.local on port 443: Connection timed out.

What is the probable cause of this issue?

A. A firewall is blocking traffic from the vCloud Usage Meter to vcenter.corp.local.

B. vCloud Usage Meter needs reconfiguring to port 7444 for proper vCenter communication.

C. vCloud Usage Meter is not configured with an SMTP server.

D. The Site ID field is unpopulated on the Service Provider Information tab.