The correct answer is: A. Advertised
A passenger train shall not be started from a station before the advertised time. This is to ensure that passengers have enough time to board the train and to avoid any delays. The advertised time is the time that is displayed on the train schedule and is the time that passengers should expect the train to depart.
Option B, non-advertised, is incorrect because the train should not depart before the advertised time, even if it is not possible to depart at the exact advertised time. Option C, both, is incorrect because the train should not depart before the advertised time, even if it is possible to depart at a non-advertised time. Option D, none of these, is incorrect because the train should not depart before the advertised time.