On driving a scooter for a long time, the air pressure in the tyres slightly increases

Question

$\begin{array}{1 1} (a)\; \text{because work is done against friction is converted to heat, which increases the pressure}\\ (b)\; \text{because work is done against gravity is converted to heat, which increases the pressure } \\ (c)\; \text{The air resistance increases the pressure} \\ (d)\; \text{As the velocity increases the pressure also increases} \end{array}$