Which of the following processes should have ΔS < 0?

H2O(s) -> H2O(g)
NaCl(s) + H2O(l) -> NaCl(aq)
CaCO3(s) -> CaO(s) + CO2(g)
2 NO2(g) -> N2O4(g)
A) 1 and 2
B) 2 and 3
C) 3 and 4
D) 1 and 4