Which of the following route patterns will be used?

An IP phone user has dialed “15152211221”.
Which of the following route patterns will be used?

A.
1515[^0-1]2[12]+[34]?

B.
1515[^0-1]4[012]+

C.
1515[0-1]4[123]

D.
1515[0-2]412[012]+

E.
This will not match any of the patterns.

Explanation: