Task: Question Answering
Input (English): Question: How many ounces of a 60% salt solution must be added to 30 ounces of a 20 percent salt solution so that the resulting mixture is 40% salt?

 Option A: 16.67

 Option B: 30

 Option C: 50

 Option D: 60.33

 Option E: 70
Output (English): Option B