The reaction 3 A + B → 2 C + D was proposed to observe the following three-step mechanism:
Step 1: A + B ⇌ F (fast)
Step 2: F + A → C + G (slow)
Step 3: G + A → C + D (fast)
What is the rate law predicted by the mechanism?

• A. Rate = k[A]²[B]²
• B. Rate = k[A]³[B]
• C. Rate = k[B]²
• D. Rate = k[A]²[B]

Answer: (D)