When a Particular Solid Begins to Dissolve in Water,the Temperature

Multiple Choice

When a particular solid begins to dissolve in water,the temperature rises dramatically.For the dissolving of this solid in pure water

A) ΔH_soln is always negative and ΔS_soln may be negative or positive.
B) ΔH_soln is always negative and ΔS_soln is always positive.
C) ΔH_soln is always positive and ΔS_soln may be negative or positive.
D) ΔH_soln is always positive and ΔS_soln is always positive.