What is the greatest positive integer x such that 3^x is a factor of 9^8?  Select the correct option: A) 5 B) 9 C) 16 D) 20 E) 30
What is the greatest positive integer x such that 3^x is a factor of 9^8?   9^8 = (3^2)^8 = 3^16   C. 16
<result>C</result>
What is the greatest positive integer x such that 3^x is a factor of 9^8?