According to ITU-T E.164 recommendations, which two fields in the National Significant Number
code may be further subdivided? (Choose two.)

A.
Country Code

B.
National Destination Code

C.
Subscriber Number

D.
Regional Significant Number

E.
Local User Code

F.
National Numbering Plan

Explanation:
A telephone number can have a maximum of 15 digits .The first part of the
telephone number is the country code (one to three digits) .The second part is the national
destination code (NDC). The last part is the subscriber number (SN). The NDC and SN together
are collectively called the national (significant) number