Studded tires may be used to improve grip in case of...

Studded tires may be used to improve grip in case of...
A)They may only be used in case of ice on the surface but not with snow.
B)They may be used in case of either ice or snow on the surface.Correct
C)Their use is prohibited on public roads.
Studded tires can be used on icy or snowy surfaces. They must have rounded edges and cannot protrude more than 2 millimeters from the surface.
These types of tires replace chains when their use is mandatory.