Advise from your experience what is the reference you think it is better to choose for seo promotion. The subject site - interior design, i.e. max. three categories of articles. The website on wp.
V. No. 1 site.com/article-01
V. No. 2 site.com/articles/article-01
(no categories, all staticly in articles)
V. No. 3 site.com/category/article-01
V. No. 4 - site.com/articles/category/article-01.html