Assume there are two attachment circuits (AC-1, AC-2) and two pseudowires (PW-1, PW-2) connected to a multipoint VFI on PE-1. When receiving an Ethernet frame from AC-1 and the destination MAC address is unknown to PE-1, to what circuit will the Ethernet frame NOT be forwarded?

A.
AC-1

B.
AC-2

C.
PW-1

D.
PW-2