The belief generally led to bills that supported people who decided to
move out west. Thus, many people moved out west, which led directly to
Indians loosing land, Mexico loosing lands, and indirectly the
California Gold rush, and many many other things.
Answer: B. Internet connection speed
Internet speeds vary for many reasons and they won't have an impact on whether a source is credible or not. Instead, you should look at the domain name, the website name, the author, etc to check credibility. You should also get as many sources as you can to back up a claim.
Answer:
2. & 3.
Explanation:
That's my guess, this is a somewhat subjective question that really applies to your curriculum, hopefully someone who has taken the course can give a better answer.