Task: Question Answering
Input (English): Problem: the ratio , by volume , of soap to alcohol to water in a certain solution is 2 : 50 : 100 . the solution will be altered so that the ratio of soap to alcohol is doubled while the ratio of soap to water is halved . if the altered solution will contain 100 cubic centimeters of alcohol , how many cubic centimeters of water will it contain ? 
Options: a ) 50 , b ) 200 , c ) 400 , d ) 625 , e ) 800
Output (English): e