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

Input: Consider Input: Problem: in gabriel ' s sheep herd , every sheep has either fleas or lice or both . half of the sheep have lice , and 84 sheep have both pests . if 94 sheep have lice , how many sheep have only fleas ?
Options: a ) 10 , b ) 20 , c ) 84 , d ) 94 , e ) 178

Output: a

Input: Consider Input: Problem: in assembling a bluetooth device , a factory uses one of two kinds of modules . one module costs $ 15 and the other one , that is cheaper , costs $ 10 . the factory holds a $ 140 worth stock of 13 modules . how many of the modules in the stock are of the cheaper kind ?
Options: a ) 20 , b ) 25 , c ) 30 , d ) 11 , e ) 35

Output: d

Input: Consider Input: Problem: how many numbers up to 300 and 700 are divisible by 2 , 3 and 7 both together ?
Options: a ) 9 , b ) 10 , c ) 11 , d ) 12 , e ) 13
Output: a