Which Salesforce resource should an admin use to search for nonprofit user groups in a particular region or state?

A volunteer manager at a nonprofit organization needs to be able to search for volunteers with landscaping skills who are available at a given time. The organization is using Volunteers for Salesforce. What should the consultant advise?

A nonprofit using NPSP receives funding it uses to award grants to national and local arts organizations. The nonprofit wants to track the funds it receives and allocates.
What should a consultant recommend to the nonprofit-?

A nonprofit has employed a contract developer for work involving objects that contain personal and personally identifiable information. The contractor is working in a full copy sandbox.
What should the consultant recommend to ensure the contractor is unable to access this sensitive data?

The event manager for a nonprofit organization periodically imports a cleaned, structured list of event registrations. Now should the consultant set up the TDTM Trigger Handlers?