Task: Question Answering
Input (English): Problem: virginia , adrienne , and dennis have taught history for a combined total of 87 years . if virginia has taught for 9 more years than adrienne and for 9 fewer years than dennis , for how many years has dennis taught ? 
Options: a ) 23 , b ) 32 , c ) 38 , d ) 41 , e ) 44
Output (English): c