The tax create a deadweight loss of $15 per day.
A tax revenue means the sum derived from tax payers.
Dead weight loss = 0.5 * (P2 - P1) * (Q1 - Q2)
Dead weight loss = 0.5 * 0.25 * 120
Dead weight loss = $15
Hence, the tax creates a deadweight loss of $15 per day.
Therefore, the Option C is correct.
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