Transition-State Intermediates Have Higher Energies Than the Reactants And/or Products

Transition-state intermediates have higher energies than the reactants and/or products because

A) energy has been supplied to the system to increase the ground state of the products.
B) energy has been used to supply the enzyme to the reaction.
C) the chemical bonds of the reactants have been stretched and stressed to near breaking.
D) the transition state is further along the time course of the reaction.
E) the reactants have been completely used up to form products.