Analyze how physiological conditions differ from standard conditions and their impact on Gibbs free energy calculations.

• A. Physiological conditions differ only in concentration, which has a minimal impact on Gibbs free energy calculations.
• B. Physiological conditions only differ in pressure, which does not affect Gibbs free energy calculations.
• C. Physiological conditions vary in temperature, pressure, and concentration, affecting Gibbs free energy calculations by altering reaction spontaneity.
• D. Physiological conditions are identical to standard conditions, thus having no impact on Gibbs free energy calculations.

Answer: (C)