<span>In randomized controlled trials, people are randomly assigned to each category to offset any potential bias.
</span>Selection bias<span> is the phenomenon where</span><span> the </span>selection<span> of people or groups is not adequately randomized to offset potential bias in research studies. This in turn does not ensure that the study samples included in research are representative of the population needed to be tested on.</span>
<span>"Tax bracket" is a term associated with progressive type of taxation. The correct option among all the options that are given in the question is the third option or option "C". The other choices given in the question can be neglected. I hope that this is the answer that has come to your great help.</span>
C) The Articles of Confederation was the country's first "rough draft" of the Constitution you could say and when they figured it was not going to work they created the Constitution.
