The Jukes-Cantor and Kimura two-parameter models differ in that Click or tap a choice to answer the question. A) The Jukes-Cantor model assumes that all base substitutions occur at the same rate, whereas the Kimura two-parameter model assumes that substitutions between purines and pyrimidines occur with a lower probability than substitutions of one purine for another or one pyrimidine for another. B)The Jukes-Cantor model applies a parsimony criterion to determine the tree that best fits a set of character data , whereas the Kimura two -parameter model evaluates the posterior probability distribution to choose the best tree. C. The parameters of the Jukes -Cantor model represent mutation rates , whereas those of the Kimura two-parameter model represent substitution rates