Which of the Following Is NOT a Property of the Classical

Which of the following is NOT a property of the classical pathway C3 convertase?

A) Composed of proteolytic fragments of C4 and C2
B) Has protease activity specific for C3 to form C3b
C) Inhibited by decay acceleration factor (DAF)
D) Stabilized by C4 binding protein (C4bp)
E) Same substrate specificity as the alternative pathway C3 convertase