Well according to me the second phrase describes the passage above best
It gonna be Primary because of what question asked
Answer:
in general d sounds most convincing, even tough I often went with a. but the risk of failure is high and if the amount of material is just too much for one day it will just not work.
b and c just don't sound like good strategies at all, but the choice depends on the material and the time and resources you have.
C, costs a lot initially. Hope this helps!