Now server.channels=ch1 is available, set the Channel type to File Channel, which of the following configurations are correct?

Now server.channels=ch1 is available, set the Channel type to File Channel, which of the following configurations are correct?
A . server.channels.ch1.type = file
B . server.channels.ch1.type = memory
C . server.channels.type = memory
D . server.channels.type = file

Answer: A