A 100-ML Sample of Water Is Placed in a Coffee $\Delta$

A 100-mL sample of water is placed in a coffee cup calorimeter. When 1.0 g of an ionic solid is added, the temperature decreases from 21.5°C to 20.8°C as the solid dissolves. Which of the following is true for the dissolving of the solid?

A) ( $\Delta$ H < 0)
B) ( $\Delta$ S_sys< 0)
C) ( $\Delta$ S_univ > 0)
D) ( $\Delta$ S_surr > 0)
E) none of these