In this task, you need to provide the correct option for a given problem from the provided options.
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Question: Problem: in assembling a bluetooth device , a factory uses one of two kinds of modules . one module costs $ 8 and the other one , that is cheaper , costs $ 3 . the factory holds a $ 100 worth stock of 25 modules . how many of the modules in the stock are of the cheaper kind ? 
Options: a ) 21 , b ) 20 , c ) 22 , d ) 23 , e ) 24

Answer: b


Question: Problem: 9 log 9 ( 6 ) = ? 
Options: a ) 1 , b ) 6 , c ) 3 , d ) 4 , e ) 5

Answer: b


Question: Problem: water consists of hydrogen and oxygen , and the approximate ratio , by mass , of hydrogen to oxygen is 2 : 16 . approximately how many grams of oxygen are there in 117 grams of water ? 
Options: a ) 100 , b ) 102 , c ) 104 , d ) 106 , e ) 108

Answer:
c