Technician A says that when oil oxidizes it becomes heavier and forms varnish deposits. Technician B says that in-town driving is easier on the engine than driving on the freeway.

Technician A says that when oil oxidizes it becomes heavier and forms varnish deposits. Technician B says that in-town driving is easier on the engine than driving on the freeway. Who is right?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B