What is the default filename for the component trace file?（）

A.CRS Node Manager 
B.CRS Engine 
C.Cisco Recording 
D.CRS Application Editor 
E.Cisco Monitoring 
F.CRS Repository Datastore, CRS Historical Datastore, CRS Config Datastore, CRS Agent Datastore

A.It can be used in conjunction with another step. 
B.It allows the application programmer into another section of the application. 
C.Most of the Extended Get Digit String variables can be changed while the application is running. 
D.It allows the entry of a Boolean expression for the Interruptible and Clear DTMF Buffer on Retry fields.