It is "<span>extension of slavery."
</span>
An allusion is something that is not real look very real.
Answer:
There's a quizlet on this, it's the first that pops up when you copy n paste the question onto Google.
<u><em>A</em></u>
<u><em>B</em></u>
<u><em>C</em></u>
<u><em>E</em></u>
He was criticizing their teachings and practices.
