How is a SIP trunk in Cisco Unified Communications Manager configured for SIP precondition?

A.	The configuration is done by selecting a SIP precondition trunk for trunk type.
B.	The configuration is automatically selected when RSVP is enabled for the location assigned to the trunk.
C.	SIP precondition is configured by selecting E2E for RSVP over SIP on the default SIP profile assigned to the SIP trunk.
D.	SIP precondition is configured by configuring a new SIP profile and selecting E2E for RSVP over SIP. The new SIP profile must then be assigned to the SIPtrunk.