Which statement describes what happens when the phone attempts to register with Cisco unified Communications manager?

Refer to the exhibit. The common device configuration has been assigned to an IPv4 only phone. Which statement describes what happens when the phone attempts to register with Cisco unified Communications manager?

A. The IP phone displays the message `registration rejected’ because it cannot support IPv6
B. The IP phone invokes MTP to translate from ipv4 to IPv6
C. The IP phone ignores the settings and registers with the ipv4 address
D. The IP phone uses SLAAC to acquire an IPv6 address and override the limitation