GKFix MCQ Question

What is the Kc expression for 2Cu(NO₃)₂(s) ⇌ 2CuO(s) + 4NO₂(g) + O₂(g)?

• A. [CuO]²[NO₂]⁴[O₂] / [Cu(NO₃)₂]²
• B. [NO₂]⁴[O₂]
• C. [NO₂][O₂]
• D. [Cu(NO₃)₂] / [CuO]