What is the output of the following code?
function fibonacci (&$xl = 0, &$x2 = 1)
{
$result= $xl + $x2;
$xl = $x2;
$x2 = $result;
return $result;
for ($i = 0; $i < 10; $i++) {
echo fibonacci() . ‘,’;
}
A . An error
B . 1,1,1,1,1,1,1,1,1,1,
C . 1,1,2,3,5,8,13,21,34,55,
D . Nothing
Answer: B