The following excerpts from the first two paragraphs of a newspaper article by Adam Kleinbaum and Michael Tushman, outline how the Silo Effect can be problematic:

"Big companies are good at innovating within silos, but woefully bad at combining creative energies across divisions ... silo focus and ruthless efficiency come at the cost of cross-divisional collaboration, so some innovation opportunities are either poorly executed or not seen at all."

Which of the following statements best express the authors' view on how to foster innovation that is otherwise inhibited by the Silo Effect?

Note: Multiple solutions are possible.

Group of answer choices

a. The solution lies in reorganisation rather than the social networks that exist throughout the company.

b. Promoting "idea brokers" is all that is required to overcome the harm caused by the Silo Effect.

c. Informal social networks are necessary but not sufficient.

d. Executives must manage the transition from the discovery of a collaborative opportunity to the execution of a formal cross-divisional project.