When an incoming PSTN call arrives at an MGCP gateway, how does the calling number get normalized to a global E.164 number with the + prefix in Cisco Unified Communications Manager?

A.
Normalization is done using translation patterns.

B.
Normalization is done using route patterns.

C.
Normalization is done using the gateway incoming called party prefixes based on number type.

D.
Normalization is done using the gateway incoming calling party prefixes based on number type.

E.
Normalization is achieved by local route group that is assigned to the MGCP gateway.

Explanation:
Ok see 1-136 CIPT2 v8.0