In FIG illustrated EPON networking, the OLT to the network all the ONU ( the ONU1 to ONUn ) to transmit data, the following statements is correct is ____ .( Choose one or more )

In FIG illustrated EPON networking, the OLT to the network all the ONU ( the ONU1 to ONUn ) to transmit data, the following statements is correct is ____ .( Choose one or more )
A . Line Road 0 have all the ONU data
B . Line Road 1 on which all the ONU data
C . wire passage 2 is only to ONU2 data
D . Line Road 0 ~ n- downlink data is the same

Answer: ABD