I personally think the answer is
a. There are few residential areas and thus few adolescent recruits.
~Hope this helps!
Mountains hindered westward travel in many ways.
1) the mountainous paths were dangerous and did not point to a particular direction.
2) one had to pass through several difficulties while passing the mountains.
3) there was increased danger of being lost or being attacked
4) one could not pass mountainous pathways quickly, it sucked up a lot of time
5) Riddled and confusing weather also played part in hindering the westward move
If you're referring to the independence of the USA from England,
the country celebrates that occasion on July 4 of each year.
The likely reason as to why the south Vietnam had rejected
the October 1972 draft agreement was because of the fact that it is not allowed
by the NLF to control, causing the draft agreement to be easily rejected at
once.
Well for one I see a world that has gone to hell