$$A\rightarrow D$$ is an endothermic reaction occurring in three steps ( elementary).
(i) $$A\rightarrow B \triangle H_{i}=+ve$$
(ii) $$B\rightarrow C \triangle H_{ii}=-ve$$
(iii) $$C\rightarrow D \triangle H_{iii}=-ve$$
Which of the following graphs between potential energy (y-axis) vs reaction coordinate (x-axis) correctly represents the reaction profile of A-> D?

A

B

C

D