Why would an HP EliteDesk 800 G6 SFF PC with optional dust filters be the tight fit for a production line?

Why would an HP EliteDesk 800 G6 SFF PC with optional dust filters be the tight fit for a production line?
A . It is secure and the addition of dust filters will extend the life of the machine.
B . It has a specialized loudspeaker system appropriate for a noisy production environment.
C . The dusk filters enable the device to run quieter than any other device within the Z range.
D . It has no fan and no moving parts to give the best reliability.

Answer: A