If a laptop is used primarily in a dusty environment, it is MOST important to regularly check for dust building up in:

If a laptop is used primarily in a dusty environment, it is MOST important to regularly check for
dust building up in:

A.
between the keys on the internal keyboard.

B.
the drive media bays.

C.
the cooling passages and fans.

D.
the external USB and docking connectors.