The detail from the speech which <em>best conveys</em> this idea that continued practice of enslavement <em>threatens the existence</em> of America itself is:
- C. "Our slaves outnumber the entire population of the country at the time of our revolutionary struggle."
<h3>Garrison's perspective on slavery</h3>
Based on the complete text, we can see that there is the Garrison is making a speech which is meant to imply that if America continues to practise slavery, then it would be a cannon ball that could destroy America.
With this in mind, we can see that from the speech, Garrison states that the number of slaves far outnumbered the entire population and if they are not made free men, the very existence of America could be gone
Therefore, the correct answer is option C
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