Final answer:
The most frequent causes of forklift injury are related to operational errors like speeding and improper turning, reflecting the importance of adhering to safety protocols to prevent workplace injuries.
Step-by-step explanation:
The question addresses the issue of workplace safety, particularly relating to the operation of forklifts. Two of the most frequent causes of forklift injury are not related to safety measures or maintenance programs but are typically operational errors such as C) Speeding and improper turning. These practices directly impact the well-being of the operators and those around them in work environments. Intense operational demands and a disregard for safety protocols, as seen in historical examples of industrial labor, have often led to serious injuries, such as those incurred in textile factories from constant exposure to machinery and harmful substances.