On stud-link anchor chain the addition of the stud increases the strength of the link by about __________.

Correct Answer: Option B — 15%

Stud-link chain incorporates a transverse bar, or stud, across the center of each link. This stud prevents the chain from kinking and collapsing under load, which increases the link's overall tensile strength by approximately 15% compared to open-link chain of the same material diameter.