Task: Question Answering
Input (English): Problem: the ratio , by volume , of bleach to detergent to water in a certain solution is 4 : 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 300 liters of water , how many liters of detergent will it contain ? 
Options: ['a ) 80', 'b ) 70', 'c ) 60', 'd ) 40', 'e ) 50']
Output (English): c