Which of the following could encourage the sharing of tools, knowledge, discoveries and lessons learned...

PeopleCert outlines multiple methods to encourage sharing and collaboration:

A: Common workspaces promote informal communication and rapid problem-solving.

B: Hackathons provide an engaging environment for innovation, cross-functional teamwork, and sharing solutions.

C: Simulations (e.g., Game Days) allow teams to practice scenarios, learn from each other, and share insights in a low-risk setting.

Each of these fosters trust, transparency, and mutual learning. Using them together can amplify cultural change and skill growth.

Thus,D—All of the above—is correct.