Which of the following best describes the optimum audience of a blog?

a. Always the largest audience possible.

b. Only people who are experts in the subject matter so that comments and discussions aren’t pulled off track by “newbies” who don’t know what they are talking about.

c. An audience large enough to justify the time required to maintain the blog but narrow enough to ensure a clear focus.

d. Whatever audience happens to find the blog on the web.