Context please so we can understand what you mean
Answer:
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The correct answer is A. luxuries
There are two categories, needs and wants. Needs are essential items that we need to survive. Wants are things that we want and are often called luxuries. You don't need them to live but you want to have them and it's useful sometimes to have them.
The problem with self selection in research is that it makes it makes causal interpretations difficult.
<h3>What is self selection?</h3>
This is a type of bias that occurs often times in social science research. In this type of bias, the respondents cause it because they are totally allowed to decide things for themselves.
The respondents are left to decide for themselves whether they want to participate in the research or not.
Read more on self selection here:
brainly.com/question/25261401
