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 2 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 ) 16 , c ) 32 , d ) 56 , e ) 60
Example Output: b

Example Input: Problem: of the people who responded to a market survey , 200 preferred brand x and the rest preferred brand y . if the respondents indicated a preference for brand x over brand y by ratio of 4 to 1 , how many people responded to the survey ? 
Options: a ) 80 , b ) 160 , c ) 250 , d ) 350 , e ) 480
Example Output: c

Example Input: Problem: the value of log 2 ( log 5625 ) is 
Options: a ) 2 , b ) 5 , c ) 10 , d ) 15 , e ) 20
Example Output:
a