This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
A 28 year old female presents with recurrent aboions and pain the calves. She is most likely suffering from a deficiency of which of the following - 
Select and explain. 
A. Protein C, B. Thrombin, C. Factor XIII, D. Plasmin
A: Protein C
Answer: A: Protein C 
Explanation: . Protein C