A laboratory reaction produces the balanced net equation
2 Ag⁺ + Cu → 2 Ag + Cu²⁺
Which set of two symbolic equations, when appropriately scaled and added, yields the equation above?
a) (I) Ag → Ag⁺ + e⁻
(II) Cu²⁺ + 2 e⁻ → Cu
b) (I) 2 Ag⁺ + 2 e⁻ → 2 Ag
(II) Cu → Cu⁺ + e⁻
c) (I) Ag⁺ + e⁻ → Ag
(II) Cu → Cu²⁺ + 2 e⁻
d) (I) Ag⁺ + e⁻ → Ag
(II) Cu⁺ → Cu²⁺ + e⁻