In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[Q]: Problem: the calendar of the year 2060 can be used again in the year ? 
Options: a ) 2081 , b ) 2083 , c ) 2088 , d ) 1971 , e ) 1973
[A]: c


[Q]: Problem: thirty percent of the members of a swim club have passed the lifesaving test . among the members who have not passed the test , 26 have taken the preparatory course and 65 have not taken the course . how many members are there in the swim club ? 
Options: a ) 60 , b ) 80 , c ) 100 , d ) 130 , e ) 140
[A]: d


[Q]: Problem: fresh grapes contain 60 % water by weight and raisins obtained by drying fresh grapes contain 25 % water by weight . how many kgs of fresh grapes are needed to get 20 kgs of raisins ? 
Options: a ) 75 kgs , b ) 64 kgs , c ) 37.5 kgs , d ) 65 kgs , e ) 70 kgs
[A]:
c