Under MOT Order 2021 No. 16, which of the following actions constitutes the unlawful act of 'refusing a hire' (拒载)?

1. Displaying the 'Vacant' (空车) sign, stopping for a hailing passenger, and driving off after hearing the destination is only 2 kilometers away
2. Refusing to transport a passenger who insists on loading open containers of gasoline into the passenger cabin
3. Refusing to carry an unattended, severely intoxicated person who is unconscious and unable to provide a destination
4. Declining to pick up a passenger while displaying an approved 'Shift Handover' (交接班) sign along the handover route