Why Does Iodine, I₂ (S), Spontaneously Sublime at Room Temperature

Why does iodine, I₂ (s) , spontaneously sublime at room temperature?

A) The contact of iodine, I₂ (s) , with the water vapor in the air causes the sublimation process.
B) Iodine, I₂ (s) , pulls O₂ from the air as it self-oxidizes under sublimation to I₂ (g) .
C) There is an increase in entropy as solid iodine, I₂ (s) , sublimes into iodine vapor, I₂ (g) , because in the gaseous phase energy is more readily dispersed.
D) The reaction of I₂ (s) subliming to I₂ (g) is highly exothermic and therefore proceeds spontaneously.

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