What additional factors, besides the main causes, often lead to crane accidents?

The choice indicating improper maintenance and failure to conduct regular inspections is correct because these factors significantly contribute to the safe operation of cranes. Regular maintenance is essential to ensure that all mechanical parts are functioning correctly and that the equipment remains in good working order. Neglecting this aspect can lead to mechanical failures that may not be immediately evident but can create hazardous situations during operation. Similarly, conducting regular inspections is critical to identifying potential issues before they result in accidents. This includes checking for wear and tear, ensuring all safety devices are operational, and addressing any visible defects. Without proper maintenance and inspections, the risk of accidents increases significantly, underscoring the importance of these practices in promoting workplace safety when using cranes.