How can deadweight loss be used to assess the efficiency loss in a market due to taxation?

• A. Deadweight loss measures the increase in tax revenue, indicating efficiency gain.
• B. Deadweight loss measures the increase in consumer surplus, indicating efficiency gain.
• C. Deadweight loss measures the decrease in producer surplus, indicating efficiency gain.
• D. Deadweight loss measures the trades that do not occur due to taxation, indicating efficiency loss.

Answer: (D)