Identify the Letter of the Choice That Best Matches the Phrase

Identify the letter of the choice that best matches the phrase or definition.
-Primary circuit board of a computing device

A) input device
B) control unit
C) solid-state storage
D) transistor
E) optical storage
F) ROM
G) flash drive
H) integrated circuit
I) output device
J) motherboard
K) USB
L) flash memory