The third proportional to 1 and 3 is?  Select
A) 9  B) 10  C) 11  D) 12  E) 13
(3*3)/1= 
<gadget id="calculator">(3*3)/1</gadget>
<output>9</output>
9   9NSWER:9
<result>A</result>
The third proportional to 1 and 3 is?