A recent surgery patient receiving warfarin therapy was found to be bleeding internally. The clotting process is impaired in this patient primarily because of which of the following? (A) Inability of...

A recent surgery patient receiving warfarin therapy was found to be bleeding internally. The clotting process is impaired in this patient primarily because of which of the following?

(A) Inability of the liver to synthesize clotting factors (B) A specific inhibition of Factor XIII activation (C) An inability to form clotting factor complexes on membranes (D) A reduction of plasma calcium levels (E) An enhancement of protein C activity