For a Chemical Reaction Taking Place at Constant Pressure, Which $\Delta$

For a chemical reaction taking place at constant pressure, which one of the following is true?

A) $\Delta$ H_system = (Kinetic Energy) _system + (Potential Energy) _system
B) $\Delta$ H_system = (Kinetic Energy) _system - (Potential Energy) _system
C) $\Delta$ H_system = $\Delta$ E_system $\Delta$ q_p
D) $\Delta$ H_system = $\Delta$ E_system + P $\Delta$ V_system
E) $\Delta$ H_system = $\Delta$ E_system + q_p