Final answer:
According to OSHA standards, free-standing bricks should not be stacked higher than 7 feet to ensure stability and prevent potential hazards.
Step-by-step explanation:
The question related to the stacking height limit for free-standing bricks pertains to safety standards, specifically those which may be outlined by the Occupational Safety and Health Administration (OSHA). Safety codes and practices are designed to prevent workplace accidents and injuries. According to OSHA standards, the maximum height for safely stacking free-standing bricks is typically restricted to prevent the stack from becoming unstable and posing a hazard. While the exact height may vary based on specific regulations and the setting in which the bricks are used, a common limit set for stacking materials such as bricks is 7 feet (Option C), which is considered a safe height to prevent them from toppling over.