Question

a page or website that contains chronological posts and comments from individuals or organizations is known as a(n):
a blog
b aggregator
c wiki
d web portal

Explanation:

A blog is a website or page that presents content in reverse - chronological order (newest posts first) and often allows for comments. An aggregator collects content from multiple sources. A wiki is a collaborative website where users can edit content. A web portal is a starting point for accessing various resources. Based on the description of chronological posts and comments, the term that fits is "blog".

Answer:

A. blog