What type of clothing is NOT suitable for flaggers during work conditions?

Flaggers play a crucial role in maintaining safety in work zones, and their clothing is a vital part of this function. The primary purpose of a flagger's attire is to ensure visibility to drivers and individuals in the area. Bright, reflective colors such as bright yellow or orange are recommended because they enhance visibility in various lighting conditions.

Dark green, while it may be acceptable in some contexts, does not provide the high level of visibility required for flaggers. This color can blend into certain environments, particularly in areas with vegetation, thus diminishing the flagger's presence and potentially increasing the risk of accidents. In contrast, bright colors are designed specifically to stand out against backgrounds and attract attention, effectively alerting drivers to the presence of a flagger and any associated work zones.

In summary, the inappropriate choice is dark green because it does not meet the necessary safety standards for visibility in work settings, while the other options represent colors that would be more effective for ensuring that flaggers are seen by passing motorists.