What should be the length of an effective blog post and why?

[Abdullah al]

a. several pages in length
b. no more than a few sentences
c. a few sentences mixed with several links to other sites and references.
d. a few paragraphs


Which is the correct answer?

[Jake]

A traditional guideline has been 450 words ti qualify as an article, some worried about the Panda quality filter are aiming at 800 words. A paragraph long enough to hold keyword phrases may be of use now and then.

Search engines like fresh material and reward sites with regular updates.

[Pavithra]

480 paragraphs