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'.

Problem: what percent of 120 are 90 ? 
Options: a ) 25 % , b ) 50 % , c ) 75 % , d ) 33 % , e ) 30 %
c

Problem: if a large pizza has a radius that is 10 % larger that that of a medium pizza , what is the percent increase in area between a medium and a large pizza ? 
Options: a ) 15 % , b ) 21 % , c ) 25 % , d ) 30 % , e ) 36 %
b

Problem: of the land owned by a farmer , 90 percent was cleared for planting . of the cleared land , 30 percent was planted with soybeans and 60 percent of the cleared land was planted with wheat . if the remaining 540 acres of cleared land was planted with corn , how many acres did the farmer own ? 
Options: a ) 7200 , b ) 6000 , c ) 3500 , d ) 5000 , e ) 6200

b