Why should the light lenses be kept clean?

En español: ¿Por qué deben mantenerse limpias las ópticas (cristales) de las luces?

A To ensure optimal visibility Correct answer
B To make the car faster
C To reduce oil consumption
D To improve tyre pressure

Why this is the correct answer

Keeping the light lenses clean ensures optimal visibility, both for seeing the road and for being seen by other drivers.

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