Below in the Figure of a Reaction Energy Diagram Is

Below in the figure of a Reaction Energy Diagram is labeled two parameters, x and y . What are these two parameters and is this reaction endothermic or exothermic ?

A) "x" is the energy of activation, "y" is the heat of the reaction and this reaction is endothermic.
B) "x" is the energy of activation, "y" is the heat of the reaction and this reaction is exothermic.
C) "x" is the heat of the reaction, "y" is the energy of activation and this reaction is endothermic.
D) "x" is the heat of the reaction, "y" is the energy of activation and this reaction is exothermic.
E) "x" is the heat of the transition state, "y" is the heat of the reaction and this reaction is exothermic.