In Which One of These Pairs Will the Entropy of the First

In which one of these pairs will the entropy of the first substance be greater than that of the second? Assume P and T are the same for each pair, unless stated otherwise.

A) 1 mole of F₂(g) ; 1 mole of Cl₂(g)
B) 1 mole of I₂(s) ; 1 mole of I₂(g)
C) 1 mole of CaCO₃(s) ; 1 mole of CaO(s) plus 1 mole of CO₂(g)
D) 1 mole of H₂(g) at 25 $\degree$ C; 1 mole of H₂(g) at 50 $\degree$ C
E) 1 mole of O₃(g) ; 1 mole of O₂(g)