What is the greatest positive integer x such that 3^x is a factor of 9^7?	Choose the correct answer
A) 5	B) 14	C) 10	D) 20	E) 30
What is the greatest positive integer x such that 3^x is a factor of 9^7?   9^7 = (3^2)^7 = 3^14   B. 14
<result>B</result>
What is the greatest positive integer x such that 3^x is a factor of 9^7?