Task: Question Answering
Input (English): Problem: the ratio , by volume , of bleach to detergent to water in a certain solution is 2 : 40 : 100 . the solution will be altered so that the ratio of bleach to detergent is tripled while the ratio of detergent to water is halved . if the altered solution will contain 200 liters of water , how many liters of detergent will it contain ? 
Options: a ) 60 , b ) 55 , c ) 50 , d ) 45 , e ) 40
Output (English): e