Chemical Kinetics · Potential energy reaction profile

$\ce{A -> D}$ is an endothermic reaction occurring in three steps (elementary).

(i) $\ce{A -> B}$ $\Delta H_\mathrm{i} = +$ve

(ii) $\ce{B -> C}$ $\Delta H_\mathrm{ii} = -$ve

(iii) $\ce{C -> D}$ $\Delta H_\mathrm{iii} = -$ve

Which of the following graphs between potential energy (y-axis) vs reaction coordinate (x-axis) correctly represents the reaction profile of $\ce{A -> D}$ ?