Task: Question Answering
Input (English): Problem: a particular library has 150 books in a special collection , all of which were in the library at the beginning of the month . these book are occasionally loaned out through an inter - library program . if , by the end of the month , 65 percent of books that were loaned out are returned and there are 108 books in the special collection at that time , how many books of the special collection were loaned out during that month ? 
Options: a ) 40 , b ) 60 , c ) 80 , d ) 100 , e ) 120
Output (English): e