Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?  Select the correct option:
A) 1/8
B) 1/16
C) 1/6
D) 1/4
E) 190
4/2= 
<gadget id="calculator">4/2</gadget>
<output>2</output>
2   2/2= 
<gadget id="calculator">2/2</gadget>
<output>1</output>
1   1/2= 1/2   (1/2)/2 = 1/4   (1/4)/2 = 1/8
<result>E</result>
Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?