1 kg of water at 273 K is brought into contact with a heat reservoir at 373 K. When the water has reached 373 K, what are the changes in entropy of the water, the reservoir, and the universe?

a) The entropy of the water increases, the entropy of the reservoir decreases, and the entropy of the universe increases.
b) The entropy of the water increases, the entropy of the reservoir increases, and the entropy of the universe remains constant.
c) The entropy of the water increases, the entropy of the reservoir increases, and the entropy of the universe increases.
d) The entropy of the water remains constant, the entropy of the reservoir increases, and the entropy of the universe increases.