“I was so anxious to see it kept entire, lest the goats should break through, that I never left off till, with infinite labour, I had stuck the outside of the hedge…full of stakes…”

—Robinson Crusoe by Daniel Defoe
I think it is C

Understatement

Overstatement

Ambiguity

Sarcasm

http://www.dictionary.com

Make sure you are crystal clear on the meanings of these four choices.

I think it is not really full of stakes, therefore it is overstatement.

probably

Based on the given excerpt from Robinson Crusoe by Daniel Defoe, the correct answer would be ambiguity. Ambiguity refers to the use of language that can be understood in multiple ways or has more than one possible interpretation. In this case, the speaker's statement about sticking the outside of the hedge full of stakes could be seen as ambiguous because it is not clear whether the stakes were placed on the outside of the hedge as a protective measure or as a means of constructing the hedge itself.