Task: Question Answering
Input (English): Problem: if each digit in the set a = { 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 } is used exactly once , in how many ways can the digits be arranged ? 
Options: a ) 356,580 , b ) 358,680 , c ) 360,780 , d ) 362,880 , e ) 364,980
Output (English): d