which file type describes the contents of the firmware image?

How are firmware images implemented and which file type describes the contents of the firmware image?

A.
Firmware images are implanted as firmware groups that are described by a file that has a .cnf suffix.

B.
Firmware images are implemented as individual files that are described by a file that has a .loads suffix.

C.
Firmware images are implemented as a file loader group and are described by a file that ends with a .sbn suffix.

D.
Firmware images are implemented as file bundles that are described by a file that ends with a .loads suffix.

Explanation: