Resource allocation in different economic systems — practice question

When a country shifts from a market economy to a mixed economy, at what stage is this change most likely to bring about the biggest improvement in resource allocation?

• Anumber of demerit goods in the country: many; Gini coefficient value for the country: 0.4
• Bnumber of demerit goods in the country: many; Gini coefficient value for the country: 0.7
• Cnumber of demerit goods in the country: few; Gini coefficient value for the country: 0.4
• Dnumber of demerit goods in the country: few; Gini coefficient value for the country: 0.7