Task: Question Answering
Input (English): Problem: for every even positive integer m, f ( m ) represents the product of all even integers from 2 to m, inclusive. for example, f ( 12 ) = 2 x 4 x 6 x 8 x 10 x 12. what is the greatest prime factor of f ( 24 ) ?
Options: a. 23, b. 19, c. 17, d. 13, e. 11
Output (English): e