ΔH and ΔS are negative.
The given reaction represents the formation of chlorine molecule from chlorine atoms.
Here, the bond formation is taking place. Therefore, energy is being released. Hence, ∆H is negative.
Also, two moles of atoms have more randomness than one mole of a molecule. Since spontaneity is decreased, ∆S is negative for the given reaction.
Hence option C is the correct answer.