A mechanism for holding nonprofit organizations accountable is ______.

A) lucidity
B) autocracy
C) transparency
D) impenetrability

Transparency is the mechanism for holding nonprofit organizations accountable as it requires them to disclose their financial and operational information to the public. This allows stakeholders to evaluate the organization's effectiveness and ensures that it is fulfilling its mission and using its resources properly. Lucidity refers to clarity or simplicity, while autocracy refers to a system of government with unlimited power. Impenetrability means being impossible to penetrate or understand.