Which of the following will cause an increased risk of thrombosis?

Which of the following will cause an increased risk of thrombosis? Select one: O a. Reduction in the amount of antithrombin III in. circulation. O b. An increase in the amount of plasmin in the circulation i O c. Nitric oxide production by endothelial cells O d. Prostaglandin PGI2 production by endothelial cells. e. High levels of fibrin degradation products in the circulation.