Urgent priority is enabled on the directory number configuration page. This allows the call to be routed at once to the fully qualified DN without any necessity to wait for inter-digit-timeout. If the Urgent Priority checkbox is disabled and you have overlap patterns configured, then CUCM waits for the user to dial further digits.
The other options are incorrect because:
Route partitions are used to group route patterns and route lists.
Transformation patterns are used to convert dialed digits into a different format.
CTI ports are used to connect Cisco Unified Communications Manager to third-party applications.
https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/200477-Urgent-Priority-Configuration-on-Directo.html