C: Once filtration station is approved, Y will never again need Z.
E: Y needs high-quality water, and Z is supplier of pure spring water.
Filtration station provides enough high-quality water.
LJ: Assume that filtration station is substitute for Z's product.
A. Does the filtration station have to be approved by Factory Y's management or by a government authority?
(Who approves does not bridge the gap => ELIMINATED)
B. Is the demand for Factory Y's juice, and consequently the need for additional manufacturing lines, on the rise?
(Whether demand is on rise does not bridge the gap => ELIMINATED)
C. Will the profits created by Factory Y, at some point in the future, exceed those created by Company Z ?
(Profits does not bridge the gap => ELIMINATED)
D. Is the quality of the water supplied by Company Z higher or lower than that produced by Factory Y's station?
(YES, acc to our assumptions)
E. Is the water supplied by Company Z also used by the competitors of Factory Y? (who uses company Z product does not bridge the gap => ELIMINATED)
Ans: D