In this task, you need to provide the correct option for a given problem from the provided options.

Example Input: Problem: the ratio between the number of sheep and the number of horses at the stewart farm is 5 to 7 , if each horse is fed 230 ounces of horse food per day and the farm needs a total 12,880 ounces of horse food per day , what is the number of sheep in the farm ? 
Options: a ) 18 , b ) 28 , c ) 40 , d ) 56 , e ) 60
Example Output: c

Example Input: Problem: an alloy is to contain steel and iron in the ratio 5 : 2 . the iron required to be melted with 35 kg of steel is ? 
Options: a ) 12 kg , b ) 14 kg , c ) 15 kg , d ) 20 kg , e ) 18 kg
Example Output: b

Example Input: Problem: what is the factorial of 5 ? 
Options: a ) 1 , b ) 60 , c ) 120 , d ) 130 , e ) 180
Example Output:
c