given the two values below which of following possiblities will print..., PHP Input/Output, PHP

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Question:Given the two values below, which of the following possiblities will print 10 foos20 bars?
<?php

$var1 = "10 foos";
$var2 = "20 bars";

print ???????;

?>

A None of the above 
B implode("", array($var1,$var2)); 
C $var1 . $var2 
D $var1 + $var2 
E Al

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+ AnswerB C

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Question:Given the two values below, which of the following possiblities will print 10 foos20 bars?<?php$var1 = "10 foos";$var2 = "20 bars";print ???????;?>

A None of the above

B implode("", array($var1,$var2));

C $var1 . $var2

D $var1 + $var2

E Al

B C

Question:Given the two values below, which of the following possiblities will print `10 foos20 bars`?

<?php

$var1 = "10 foos";
$var2 = "20 bars";

print ???????;

?>