Work-related musculoskeletal disorders (WRMSDs) generally result from: a single work-related event that exceeds one's lifting capability. work circumstances that are beyond the cóntrol and/or understanding of the employee. strenuous athletic activities at department social gatherings. repetitive tissue trauma events that tend to be cumulative as a function of time.

To determine the correct answer regarding the causes of work-related musculoskeletal disorders (WRMSDs), let's analyze each option: 1. **A single work-related event that exceeds one's lifting capability.** - While a single event can lead to injury, WRMSDs are typically associated with cumulative trauma rather than isolated incidents. 2. **Work circumstances that are beyond the control and/or understanding of the employee.** - This option suggests external factors, but it does not specifically address the nature of WRMSDs, which are often related to repetitive actions or poor ergonomics. 3. **Strenuous athletic activities at department social gatherings.** - This option is not relevant to WRMSDs, as these disorders are related to work activities rather than social or athletic events. 4. **Repetitive tissue trauma events that tend to be cumulative as a function of time.** - This option accurately describes WRMSDs, which often result from repetitive motions and prolonged exposure to risk factors over time. Based on this analysis, the correct answer is: **Repetitive tissue trauma events that tend to be cumulative as a function of time.**