Someone turn on a backlight

Which of these would be true of a DIMM?

A) Commonly used in mobile devices

B) Commonly used module type for DDR/DDR2/DDR3 memory

C) Every DIMM slot must be filled

D) Cannot be used with ECC memory

E) Includes electrical contacts on one side of the memory package

F) It’s so DIMM that I can’t see it anymore