Which of the following is true for the endothermic reaction Ba(OH)2(aq) + NH4NO3(aq) --> Ba(NO3)2(aq) + 2NH3(aq) + 2H2O(l)?
A: H>0 S>0
B: H<0 S<0
C: H>0 S<0
D: H<0 S>0