can i have more than one wordpress on a site?

[twn]

Originally Posted by DennisJ

out of the 3 options above which one is better?

I would say in general the wordpress in a subdirectory which can be reached from a subdomain. With this setup you can use the normal wordpress and all the plugins/themes that come with it. Some plugins & themes don't word with wpmu.

But i recommend you do a google on the difference between subdomains and subdirectories and see if the advantages of a subdomain compared to subdirectories fit your needs. There are a lot articles written about this subject.