Final answer:
An individual who is susceptible to clot formation would benefit from antithrombin.
Step-by-step explanation:
An individual who is susceptible to clot formation would benefit from antithrombin. Antithrombin is a plasma anticoagulant that inactivates factor X and opposes the conversion of prothrombin into thrombin in the common pathway. By inhibiting thrombin, antithrombin helps prevent the formation of blood clots. Therefore, individuals who are at risk of clot formation, such as those with a history of deep vein thrombosis or pulmonary embolism, would benefit from antithrombin therapy.