Which of the Following Represents an Exothermic Reaction

Which of the following represents an exothermic reaction?

A) A(g) + B(g) → 2C(g) ∆H = +100 kcal
B) A(g) → B(g) + 33 kcal
C) 50 kcal + 2A(g) → C(g) + D(s)
D) A(g) + B(g) → 2C(g) ∆H = +100 kcal and A(g) → B(g) + 33 kcal are exothermic reactions.
E) A(g) + B(g) → 2C(g) ∆H = +100 kcal and 50 kcal + 2A(g) → C(g) + D(s) are exothermic reactions.