How does an IP Phone react upon initialization, if there is no CTL and ITL files present on the device?

How does an IP Phone react upon initialization, if there is no CTL and ITL files present on the device?
A . The phone downloads only the files that are signed to that device.
B . The phone blindly trusts the next series of downloaded files.
C . The file matches the signature against the files on TFT
E . The phone displays the message, Unprovisioned.

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Answer: D