If you were advising Hoffmann$-$LaRoche, which set up Roche Partnering to manage more than $190$ alliances in the health care industry, what might not be a reason why some of those alliances could prove to be unstable or break apart?

a$.$ The partners may disagree among themselves over how to divide the profits gained from joint collaboration.

b$.$ Anticipated gains may fail to materialize for Roche Partnering due to an overly optimistic view of the synergies.

c$.$ One or more of the $190$ partners in Roche Partnering could gain access to another company's proprietary knowledge base, technologies, or trade secrets$.$

d$.$ Anticipated gains for Roche Partnering may fail to materialize due to a poor fit in terms of the combination of resources and capabilities.

e$.$ There is a risk for any or all of the $190$ partners in Roche Partnering to become overly dependent on other companies within the partnership.