A True Statement About the Transition State(s)of an S_N2 Reaction

A true statement about the transition state(s) of an S_N2 reaction is:

A) the two transition states are of unequal energy.
B) the transition states precede and follow an unstable reaction intermediate.
C) the single transition state represents the point of maximum free energy of the reaction.
D) existence of this transition state implies an exothermic reaction.
E) the transition state will always have a net charge of -1.