How does Cisco UCM perform a digit analysis on-hook versus off-hook for an outbound call from a Cisco IP phone that is registered to Cisco UCM?

How does Cisco UCM perform a digit analysis on-hook versus off-hook for an outbound call from a Cisco IP phone that is registered to Cisco UCM?
A . On-hook. by pressing the digits and entering "#" to process the call. UCM performs a digit-by-digit analysis; off-hook. UCM analyzes all digits as a string.
B . On-hook. no digit analysis is performed; off-hook. UCM requires the ‘#" to start the digit analysis
C . On-hook. UCM performs a digit-by-digit analysis; off-hook. UCM considers all digits were dialed and does not wait for additional digits.
D . On-hook. UCM considers all digits were dialed and does not wait for additional digits; off-hook.
UCM performs a digit-by-digit analysis.

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Answer: D