如下设置时，GPON OLT网络侧会收到带____VLANTAG的上行报文
FLEX MODE
SVLAN: VLAN=100 (RBVLAN PASSTHRU MODE)
SERVICE-FLOW: UNISIDEVLAN=200; NETWORKSIDEVLAN=300;
客户侧发送VLAN=200的上行报文
A.A.200
B.B.300
C.C.100
D.D.100:300
正确答案是C