If x and y are positive integers and 42x=56y what is the least possible value of xy?  Select the correct option:
A) 14
B) 28
C) 63
D) 196
E) 252
42x=56y   =&gt; x/y = 4/3   =&gt; 3x=4y   3(14)=4(14) =&gt; x*y=196   252
<result>E</result>
If x and y are positive integers and 42x=56y what is the least possible value of xy?