The largest object that can enter the eye of a synthetic sling should not exceed what size?

The correct choice is based on established guidelines for synthetic slings, specifically regarding the maximum size of an object that can safely enter the eye of a synthetic sling. When considering the diameter of the object, it should not exceed one-third of the length of the eye. This is important to ensure that the sling maintains its integrity and lifting capacity.

If the object is too large, it can compromise the sling's performance and safety during handling, potentially leading to accidents or equipment failure. The one-third ratio allows for adequate clearance and ensures optimal distribution of the load within the sling’s eye, supporting not only the strength but also the functionality of the sling during rigging operations.

Considering the other options, they propose larger diameter restrictions, which do not align with the safest practices regarding synthetic slings and load management. Following the one-third guideline enhances safety and efficiency in rigging processes.