QUIZ A

To prepare some fruit in syrup, I prepared 600 g of 20% syrup (20 g of sugar
per 100 g of syrup). Then I read on the recipe book that the syrup must be 30%.
How much sugar should I add to the syrup I have already prepared?

(A) 24 g     (B) 30 g     (C) 50 g      (D) 60 g      (E) 85 g

(A) | (B) | (C)  | (D)  | (E) ?
Outcome of your answer:
Try to understand the correct answer and, if you can, write the reasons for it