Lee is playing football with Mateo and some of their other friends. Lee notices that Mateo's pupils are dilated and that he is being particularly aggressive and unusually energetic. Halfway through the game, Mateo collapses on the field. Barely able to speak, he manages to tell Lee that he took some pills before the game, just for fun.
What should Lee do first in this situation?
A. Bring Mateo into the house and tell him to take a shower and refresh.
B. Call 911 first, then try to keep Mateo alert until emergency help arrives.
C. Give Mateo some water or other fluids to help him rehydrate and revive.
D. Put Mateo into the car and drive him to the nearest hospital immediately.