The Virtcong soldiers would use Guerrila Warfare, and tactics like sneaking up and attacking the filthy Americans.
I would say the agricultural aspect of how the Mayans grew their crops. I learned this unit just a few months ago and even a bit before. This article has a lot on the Mayan culture.
Source: www.history.com/topics/maya
I think it is A) logging/farming. let me know if I was wrong, please
<span>Tin is your answer to your question </span>
<span>I believe it is Quebec. Good luck.</span>