You are performing the initial setup of a new MAG Series device and have installed a valid CA- signed certificate on the MAG Series device. Connectivity to an existing SRX Series firewall enforcer cannot be obtained.What are two explanations for this behavior?（）

• A、The MAG Series device has multiple ports associated with the certificate.
• B、The MAG Series device's serial number needs to be configured on the SRX Series device.
• C、The SRX Series device must have a certificate signed by the same authority as the MAG Series device.
• D、The MAG Series device and SRX Series device are not synchronized to an NTP server.