Final answer:
The statement is false; when Pass Thru Caller ID is enabled, a modified CID will not display to the external number as the original caller ID will be passed through and displayed.
Step-by-step explanation:
The question relates to the behavior of a modified Caller ID (CID) mechanism within a telecommunications or VoIP (Voice over Internet Protocol) system. When the Pass Thru Caller ID feature is activated, the CID that is displayed to the recipient will be the original number from which the call originated, rather than any modified or spoofed CID. So, if a modified CID is set up in the system, but the Pass Thru Caller ID is checked, the modified CID will not display to the external number. Instead, the true original caller ID will be passed through and displayed.
This is typically a feature in business phone systems that allows companies to maintain the authenticity of their communications when necessary, or comply with legal requirements for certain types of calls. Therefore, the false statement will be the answer to the student's question; a modified CID will not display if Pass Thru Caller ID is checked.