One of the Weaknesses of the Procedural Model of Democracy

One of the weaknesses of the procedural model of democracy is that

A) it does not provide clear criteria on which to judge whether a government is democratic.
B) its reliance on rules may lead to rigidity and inefficiency.
C) it neglects the standards of classic Greek democracy.
D) it permits policies that violate standards of substantive democracy.
E) too much attention is paid to protecting minority rights.