After tissue injury, the first step in coagulation is:
A. Binding of factor XII to subendothelial collagenAll the listed steps are part of the cascade involved in establishing a firm clot. The process begins with binding of Hageman factor (factor XII) to subendothelial collagen and ends with the conversion of fibrinogen to fibrin. The fibrin forms an insoluble addition that stabilizes the platelet plug.