Given the equilibrium constants for the following reactions:

4Cu(s) + O₂(g) ⮂ 2Cu₂O(s), K₁ = 3.83
2CuO(s) ⮂ Cu₂O(s) + O₂(g), K₂ = 0.26

What is K for the system 2Cu(s) + O₂(g) ⮂ 2CuO(s) equivalent to?
a. (K₁)(K₂)
b. (K₁) / (K₂)
c. [(K2) / (K₁)]
d. [(K₁) / (K₂)]
e. (K₁)(K₂)