Which of the following can ONLY be installed when a laptop is turned off and disconnected from all power sources?

Which of the following can ONLY be installed when a laptop is turned off and disconnected from
all power sources?

A.
PCMCIA device

B.
Express card 54 device

C.
SODIMM chip

D.
USB expansion hub

Explanation:
Explanation
SODIMM module can be installed when the laptop is turned off completely and disconnected from
all power sources.