which is true about reaction rates?\nhigh reaction rates occur only in spontaneous reactions.\nlow reaction…

Answer:

D. Reaction rates are not related to spontaneity.

Brief Explanations:

Spontaneity of a reaction is determined by the change in Gibbs - free energy ($\Delta G$). A reaction is spontaneous if $\Delta G<0$, non - spontaneous if $\Delta G > 0$, and at equilibrium if $\Delta G=0$. Reaction rate, on the other hand, is determined by factors such as activation energy, temperature, concentration of reactants, and presence of a catalyst. A spontaneous reaction can have a slow or fast rate, and the same is true for non - spontaneous reactions. So, reaction rates and spontaneity are not related.