Refer to the exhibit. You have six IP phones configured to use MRGL_CFB. There are currently five conferences in progress. What will happen if the sixth IP phone tries to initiate a conference?

A.
the conference will use SW_CFB_3 since it is the default and is not assigned to MRGL_CFB

B.
the conference will be attempted until the MRGL timer expires

C.
the first conference resource that becomes available will be used for conference 6

D.
the conference will be rejected because there are no conference resources left