As of this problem together with the options presented with it, the most probable and the most likely answer for this would be A. a site associated with a local university.
An encyclopaedia site with many contributors can be prone to false information and made-up information. To add to it, some contributors might just be displaying the art of trolling over the internet and some might just be contributing just for the heck of it. A site run by a small, obscure publishing house can become more credible by becoming more renowned. A private site can either be good or bad, depending on the author that set it up. The most credible among the options would be a site associated with a local university.
