GKFix MCQ Question

What is the total potential energy of a system of two charges in an external field?

• A. q₁q₂V(r₁)
• B. (q₁ + q₂)V
• C. q₁V(r₁) + q₂V(r₂)
• D. q₁V(r₁) + q₂V(r₂) + (1/(4πε₀))(q₁q₂/r₁₂)