_x005F_x000D_ Three resistors are arranged in a circuit as shown above. The battery has an unknown but constant emf ε and a negligible internal resistance._x005F_x000D_ Now, determine the equivalent resistance of the three resistors.

• A. 12 Ω
• B. 10 Ω
• C. 16 Ω
• D. 15 Ω