Which characteristic is the best indicator of whether a resource is reliable
the length of the source
the method of publication, either online or print
the credibility of the author of the source
the type of source, either primary or secondary

The credibility of the author of the source

Explanation:

Finding a credible source is a major part of writing. If the research that has been used is not credible, the whole scenario can drop for the author. One needs to keep the key pointers of an authentic source which would include the authenticity of a source, credibility of the author. Online websites usually considered to have credibility issues.

In the above question, the major characteristic to find out if the source is credible or not should be the credibility of the author of the source.

Usually these online sources are mostly plagiarized.

the correct answer is (a) . answer should be simple, clear and brief.