Which One of the Following Reactions Would You Expect to Have

Multiple Choice

Which one of the following reactions would you expect to have the lowest $\Delta$ S°?

A) CH₄(g) + 2O₂(g) $\rarr$ CO₂(g) + 2H₂O(g)
B) C₂H₂(g) + ⁵/₂O₂(g) $\rarr$ 2CO₂(g) + H₂O(g)
C) C₂H₄(g) + O₂(g) $\rarr$ 2CO₂(g) + 2H₂O(g)
D) C₂H₆(g) + ⁷/₂O₂(g) $\rarr$ 2CO₂(g) + 3H₂O(g)