Which is true about reaction rates? A. High reaction rates occur only in spontaneous reactions. B. Low reaction rates occur only in nonspontaneous reactions. C. Reaction rates are not dependent on high or low activation energies. D. Reaction rates are not related to spontaneity.

The correct answer is D) Reaction rates are not related to spontaneity

The rate of reaction is dependent on the activation energy which when decreased, the rate increases. When a reaction is spontaneous, this means it does not need any external factors in order for the reaction to occur. Thus, s pontaneity cannot related to rate of reaction. Answer here is D