A manufacturer has 200 liters of acid solution which has 15% acid content. How many liters of acid solution with 30% acid content may be added so that acid content in the resulting mixture will be more than 20% but less than 25% ?

• A. More than 100 liters but less than 300 liters
• B. More than 120 liters but less than 400 liters
• C. More than 100 liters but less than 400 liters
• D. More than 120 liters but less than 300 liters