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Professor Lee proposed the following reaction for the preparation of 3-iodo-1-propene from propene.

The following two propagation steps were hypothesized. The relevant bond energies in kcal/mole are shown.

(A) The first reaction is endothermic.

(B) The second reaction is exothermic.

(C) The overall reaction is exothermic.

(D) The I–I bond is weaker than the H–I bond.

(E) The proposed reaction is not a good method for the preparation of 3-iodo-1-propene from propene.