Subject: mathqa
Question: a 340 - liter solution of kola is made from 88 % water , 5 % concentrated kola and the rest is made from sugar . if 4.2 liters of sugar , 10 liter of water and 6.8 liters of concentrated kola were added to the solution , what percent of the solution is made from sugar ?
Option: 
A: 10.5 % .
B: 7.7 % .
C: 11 % .
D: 6 % .
Answer: B