In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[Q]: Problem: a parking garage rents parking spaces for $ 10 per week or $ 25 per month . how much does a person save in a year by renting by the month rather than by the week ? 
Options: a ) $ 120 , b ) $ 160 , c ) $ 220 , d ) $ 240 , e ) $ 260
[A]: a


[Q]: Problem: ( x + 3 ) is a factor in x ^ 2 - mx - 15 . what is the value of m ? 
Options: a ) 1 , b ) 2 , c ) 3 , d ) 4 , e ) 5
[A]: b


[Q]: Problem: if the least common multiple of two prime numbers x and y is 10 , where x < y , then the value of 3 x + y is 
Options: a ) 7 , b ) 9 , c ) 11 , d ) 12 , e ) 21
[A]:
c