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

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

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Answer: D