which pattern would be advertised?

Refer to the exhibit

When the Cisco Unified Communications Manager advertises the Hosted DN Pattern, which pattern would be advertised?

A.
2XXX and the T0D1D will be 0:+498950555

B.
2XXX and the ToDID will be 0:+4989531 21

C.
4989S05552XXX and the ToDiD will be 0:

D.
+ 4989631 21 2XXX and the ToDiD will be 0:

E.
Both +4989505552XXXand +4989531 21 2XXX will be advertised with ToDID of 0:

Explanation:
Incorrect answer: B, C, D, E

PSTN failover prepend digit is +498950555
Link: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_0_2/ccmfeat/fscallcontroldiscovery.html