How do thermodynamics and kinetics differ in their roles in chemical reactions?

• A. Both thermodynamics and kinetics determine the rate of a reaction.
• B. Thermodynamics determines the rate of a reaction, while kinetics determines the direction.
• C. Both thermodynamics and kinetics determine the direction of a reaction.
• D. Thermodynamics determines the direction of a reaction, while kinetics determines the rate.

Answer: (D)