What makes perfect competition unique in achieving both productive and allocative efficiency?

• A. Perfect competition achieves allocative efficiency by equating average total cost with price.
• B. Perfect competition forces firms to produce at the minimum average total cost and equates marginal benefit with marginal cost.
• C. Perfect competition achieves productive efficiency by equating marginal revenue with average revenue.
• D. Perfect competition allows firms to set prices above marginal cost.

Answer: (B)