How does the second law of thermodynamics relate to the spontaneity of a reaction?

• A. The second law of thermodynamics does not relate to reaction spontaneity.
• B. A reaction is spontaneous if it increases the entropy of the universe.
• C. A reaction is spontaneous if it maintains the entropy of the universe.
• D. A reaction is spontaneous if it decreases the entropy of the universe.

Answer: (B)