B, present because as you eliminate your options (future and past) the only options left are present and present perfect and the form of present perfect is [has/have + past participle] so the last answer is present.
Answer:
The maintanece of vehicles with medical and communication equipment.
Administering first aid treatment or life support care
Immobilizing patients for the placement on stretcher and ambulance transport.
Explanation:
Hi hi hi hi hi hi decays it is
