B>it's because it states there is only one.
A statement or situation that seems to be contradictory but actually presents a truth
It’s either b or C! I hope that all helps
The first-aider will be ready with a first aid kit and will be on guard in case of accidents or injuries. First aid means, the first action done on someone who is injured or not feeling well within the designated place. He/she must know some first aid treatments or methods, such as treating a cut or bruise, giving artificial ventilation and CPR, etc.
