问题：

[多选] Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true?（）

A . Router C will use ICMP to inform Host 1 that Host 2 cannot be reached.
B . Router C will use ICMP to inform Router B that Host 2 cannot be reached.
C . Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached.
D . Router C will send a Destination Unreachable message type.
E . Router C will send a Router Selection message type.
F . Router C will send a Source Quench message type.