Regarding the USB eToken module supported on the Cisco ISR series of routers, which three of these are correct? (Choose three.)

A.
The storage size is 32KB.

B.
The storage size is 128MB.

C.
It is used for Cisco IOS image storage.

D.
Files can be encrypted and accessed via a PIN.

E.
The USB eToken feature is a Cisco proprietary feature.

F.
A bootstrap configuration can be stored in its unprotected space.