Collaborative Planning, Forecasting, and Replenishment $($CPFR$)$ is a web$-$based tool used to coordinate demand forecasting, production and purchase planning, and inventory replenishment between supply chain trading partners. In practice CPFR often doesn't deliver on its' promise because

A$)$ Computer systems at supplier companies cannot be made to work with each other.

B$)$ Forecast errors accumulate as data exchanges are made down the supply chain culminating in the "feast or famine" phenomena known as the "bullwhip effect."

C$)$ Firms in a supply chain may not trust each other sufficiently to share information openly.

D$)$ conflicting objectives between the profit$-$maximizing vendor and the cost$-$minimizing customer give rise to adversarial supply chain relationships.

a$.$ B and D

b$.$ C and D

c$.$ All of these

d$.$ A and C

e$.A,C,$ and $D$