Which, If Any, of the Following Processes Is Spontaneous Under $\to$

Which, if any, of the following processes is spontaneous under the specified conditions?

A) H₂O(l) $\to$ H₂O(s) at 25°C
B) CO₂(s) $\to$ CO₂(g) at 0°C
C) 2H₂O(g) $\to$ 2H₂(g) + O₂(g)
D) C(graphite) $\to$ C(diamond) at 25°C and 1 atm pressure
E) None of the above is spontaneous.