Which statement best describes one of the market trends toward a converged solution?

Which statement best describes one of the market trends toward a converged solution?

A.
By 2007, traditional vendors will have developed new TDM systems.

B.
Vendors are beginning to increase their support of TDM.

C.
Vendors are offering IP-enabled PBX solutions that require the use of legacy PBX hardware.

D.
Customers face the decision to continue spending to extend the life of a traditional system or invest in IP.