If your licence states that you need corrective lenses, you must wear them...?

Answer: B — At all times

Corrective lenses are necessary for individuals whose vision needs to be corrected while driving. However, their license requires them to wear the corrective lenses at all times, not just while driving. Option B is the only correct option, as the other options are limiting in terms of when the corrective lenses need to be worn. Option A only specifies while driving, option C only at night, and option D only during the day. These options do not cover all potential scenarios and therefore are incorrect.