A student prepared a solution by adding solid ammonium nitrate, $NH4NO3,$ to a

beaker containing water at $25C.$ After the solid dissolved, the student

measured the temperature of water and found it has dropped to $20C.$ Which of

the following is true about $H$ and $S?$

$(1$ Point$)$

A$)H(-),S(+)$

B$)H(-),S(-)$

C$)H(+),S(+)$

D$)H(+),S(-)$