Task: Question Answering
Input (English): Problem: a cubical tank is filled with water to a level of 1 foot . if the water in the tank occupies 16 cubic feet , to what fraction of its capacity is the tank filled with water ? 
Options: ['a ) 1 / 2', 'b ) 1 / 3', 'c ) 1 / 4', 'd ) 1 / 5', 'e ) 1 / 6']
Output (English): c