Answer:
A. Public and Private sector partners; regional entities; non-profit organizations; and academia partners leverage a full spectrum of security and resilience capabilities, expertise and experience across the critical infrastructure community.
Explanation:
There are many communities involved when it comes to Critical Infrastructure Partnerships, they ranges from Public and Private owners and operators.
They are specifically involved in managing critical infrastructural risks and ensure there is security and resiliency of critical infrastructure, which is achieved by leveraging the whole capabilities of not just the experience and expertise of the partners involved, but also ensure the exchange of relevant information and tactical action, which helps to create an elaborate but effective situational awareness, and decision-taking which is risk free.