What happens if you do not assign a directory number to a partition?

A.
The directory number will not be allowed to receive calls.

B.
The directory number will be assigned to the null partition.

C.
The directory number will not be assigned to any partition.

D.
The directory number will be assigned to the partition named Default.

Explanation:
Page 255 – CIPT Student Guide 3.3
If you do not specify a partition for a route pattern or a DN, CCM lists the route pattern or DN in the null partition to resolve dialed digits. Digit analysis looks through the null partition last.