Domain.com is interested in deploying an IP telephony solution for their Domain.com facility and two remote test sites. The Domain.com facility has approximately 450 employees and will require a Cisco CallManager. Each of the test sites has 75 employees, and each test site will require a Cisco CallManager Express. Domain.com currently has an IP WAN connecting these sites, but it will be used for data only. Which Cisco CallManager Express deployment model would characterize each of the test sites?

A.
Cisco CallManager Express integration with Cisco CallManager

B.
Cisco CallManager Express integration with SIP

C.
Cisco CallManager Express stand-alone

D.
Cisco CallManager Express to Cisco CallManager Express