Although it is a common pastime, backpacking alone nevertheless

Take example: Mountain ranging from north to south.
of X ranging from Y to Z.

X, Y and Z are nouns.

A. inconveniences, ranging from the frequency of harsh storms along some trails to the absence of facilities for medical care and the scarcity of drinkable water along others.
x=inconveniences
Y=frequency of harsh storms along some trails
Z=absence of facilities for medical care and the scarcity of drinkable water along others

Z might be confusing: here, (absence) noun (of facilities for medical care) modifier and (the scarcity) noun (of drinkable water) modifier (along others).
=absence and scarcity along others.
This option seems right.

B. to the absence of facilities for medical care and along others the scarcity of drinkable water
Z= absence and along others scarcity (along others is used to extend list further using it before scarcity seems awkward and change meaning), wrong

C. and the absence of facilities for medical care and the scarcity of drinkable water along others
there is no "To". incomplete sentence. Wrong.

D. and the absence of facilities for medical care to the scarcity of drinkable water along others
read it like "ranging from frequency and absence to scarcity along others"
We are talking about inconviences and counting them and ending with entending list by saying along others. While counting inconviences, and should be used at the end. Wrong.

E. to the absence of facilities for medical care along others and the scarcity of drinkable water.
Z= absence along others and scarcity.
"Along others" extending medical care suggesting more lacking facilities, chaging the meaing. Not right place to use along other. Wrong.

I've tried to expalain as per my understanding. All are most welcome to correct me or put your point of veiw on my reasoning.