Which of the Following Is True for Pure Oxygen Gas $\degree$

Which of the following is true for pure oxygen gas, O₂(g) at 25 $\degree$ C?

A) ( $\Delta$ H $\degree$ _f > 0)
B) ( $\Delta$ H $\degree$ _f < 0)
C) ( $\Delta$ G $\degree$ _f > 0)
D) ( $\Delta$ G $\degree$ _f < 0)
E) (S $\degree$ > 0)