How can you determine if information on a web site is relevent to you topic

Explanation:

Make sure the source is written by a trustworthy author and/or institution. If you are using a webpage, you can usually identify the owner/publisher by the URL, or check for a copyright statement near the bottom of the page. Make sure the author has the proper credentials on the subject matter.

Explanation:

You can usually tell from the abstract, or summary of the article whether an article is related to the topic. If there is not an abstract, read the introduction of the article, then scan the article headings.

b) to encourage free trade

the structure of state governments are determined by. "state constitutins'

under the us constitution, all state governments are.'republics'