Rural living was centered around needs.
a. agricultural
b. resource
c. livestock
d. all of the above

It was in any case centered around agricultural needs, as this is what most people in the rural areas focus on. However, many combine small-scale husbandry  with agriculture, so a) and c) are correct. And if you count things like Coal for heating, then resources are also very important.

Therefore I would choose the answer d)