What does the Requalify node in a routing script do in a Cisco Unified Contact Center Enterprise system?

What does the Requalify node in a routing script do in a Cisco Unified Contact Center Enterprise system?

A.
sends the call back to the Cisco Unified IP IVR or Cisco Unified Customer Voice Portal to prompt caller for the opening menu

B.
resets all the peripheral call and ECC variables (ECCs) for the call

C.
resets the call type and transfers control of the call to the default script for the newly selected call type

D.
sends a message to an external call recording system to start recording the specific call