When dialing a number on an Avaya IP Office telephone, which dialed number has the highest priority?

When dialing a number on an Avaya IP Office telephone, which dialed number has the highest priority?
A . User Extension Number
B . Outgoing Line Group ID
C . Route ID
D . System Short Code

Answer: C

Explanation:

Reference: https://ipofficekb.avaya.com/businesspartner/ipoffice/mergedProjects/manager/_frame2.html?

Short_codes_Short_Code_Characters.html