The Conversion of a Diamond into Graphite Is a Spontaneous

Multiple Choice

The conversion of a diamond into graphite is a spontaneous reaction. Why are most women walking around with diamond rings and not graphite rings? ​

A) inorganic substances, like diamonds, do not react like organic substances
B) the transition state is very stable
C) the energy of activation is very high
D) the free energy of this reaction is too low
E) the free energy of this reaction is too high