If k is the greatest positive integer such that 3^k is a divisor of 18! then k = Choose the correct choice from the following options
A) 3
B) 4
C) 5
D) 6
E) 8
18/3= 
<gadget id="calculator">18/3</gadget>
<output>6</output>
6   18/9= 
<gadget id="calculator">18/9</gadget>
<output>2</output>
2   6+2= 
<gadget id="calculator">6+2</gadget>
<output>8</output>
8   k=8   Answer:8
<result>E</result>
If k is the greatest positive integer such that 3^k is a divisor of 18! then k =