What is the output of the following code?

What is the output of the following code?
<code>
echo 0x33, ‘ monkeys sit on ‘, 011, ‘ trees.’;
</code>

A.
33 monkeys sit on 11 trees.

B.
51 monkeys sit on 9 trees.

C.
monkeys sit on trees.

D.
0x33 monkeys sit on 011 trees.