In the case of an icy road...

In the case of an icy road...
A)To improve grip we can use chains or studded tyres.Correct
B)We cannot use studded tyres.
C)We cannot drive.
We can improve grip on ice or snow by using:
- Snow chains.
- Other authorised devices, such as textile covers.
- Winter tyres (M+S), specially designed for snow and mud.
- Studded tyres, which must have rounded edges and not protrude from the surface by more than two millimetres.