单项选择题

A.只转发至Fa0/1
B.只转发至Fa0/1和Fa0/2
C.只转发至Fa0/1、Fa0/2和Fa0/3
D.转发至Fa0/1、Fa0/2、Fa0/3和Fa0/4
E.只转发至Fa0/1、Fa0/2和Fa0/4