If k is the greatest positive integer such that 4^k is a divisor of 16! then k =  Choose the correct choice from the following: A) 3 B) 4 C) 5 D) 6 E) 7
16/4= 
<gadget id="calculator">16/4</gadget>
<output>4</output>
4   16/16= 
<gadget id="calculator">16/16</gadget>
<output>1</output>
1   4+1= 
<gadget id="calculator">4+1</gadget>
<output>5</output>
5   k=5   Answer: 5
<result>C</result>
If k is the greatest positive integer such that 4^k is a divisor of 16! then k =