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

Q: Problem: a marketing survey of anytown found that the ratio of trucks to sedans to motorcycles was 3 : 7 : 2 , respectively . given that there are 9,800 sedans in anytown , how many motorcycles are there ? 
Options: a ) 2800 , b ) 2100 , c ) 3600 , d ) 4200 , e ) 5200

A: a
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Q: Problem: in a group of 28 junior high school students , 7 take french , 10 take spanish , and 2 take both languages . the students taking both french and spanish are not counted with the 7 taking french or the 10 taking spanish . how many students are not taking either french or spanish ? 
Options: a ) 7 , b ) 6 , c ) 9 , d ) 4 , e ) 8

A: c
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Q: Problem: how many positive integers less than 30 have no common prime factor with 30 ? 
Options: a ) 5 , b ) 6 , c ) 7 , d ) 8 , e ) 9

A:
d
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