From the following reactions, determine the reactions that are exothermic. (i) F(g)+e F (g) (ii) CaCl, (s) Ca(s)+Cl, (g) (iii) NaCl(s) Na* (8)+Cl" (g) (iv) K(g)+e K (g) (A) (i) and (iv) are exothermic (B) (ii) and (iii) are exothermic (C) All the reactions are exothermic (D) (i), (ii), and (iii) are exothermic