What are the signs of ΔS, ΔH, ΔG for the sublimation of dry ice (solid CO₂) at room temperature and standard pressure?

a. ΔS < 0, ΔH > 0, ΔG < 0
b. ΔS > 0, ΔH < 0, ΔG < 0
c. ΔS > 0, ΔH > 0, ΔG > 0
d. ΔS > 0, ΔH > 0, ΔG < 0