What should the Salesforce Admin do to troubleshoot this issue?

Universal Containers builds a Community with public access to Knowledge Articles and Q&A. The developer builds a Visualforce page that shows Known Issues on their products. The developer uses a custom Object to Store Known Issues with an org-wide default sharing setting to Public Read/Write. unauthenticated users receive an error message when they try to load the page .

What should the Salesforce Admin do to troubleshoot this issue?

A. Enable "Public can access the community" checkbox under General Settings in Community Builder.

B. Add the Guest User profile to the members in Community Management.

C. Go to the Guest User profile and give to the Visualforce page.

D. Change the org-wide default sharing to Public Full Access.

Answer: C