Final answer:
The optimal location for RIC to stage during a large building incident is in an open location with ample space to prevent tripping or falling.
Step-by-step explanation:
During a large building incident, the optimal location for a Rapid Intervention Crew (RIC) to stage would be an open location with lots of space to spread out. This is important to minimize the chances of tripping or falling due to potential hazards like rolling balls or loose basketballs. By choosing a location with ample space, the RIC can effectively carry out their rescue operations without hindrance.