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Answer:
Qualitative research
Explanation:
Qualitative research is a type of research method that involves the collection and evaluation of qualitative data, which are non-numerical. This type of research is naturalistic, which involves having a real standing of things the way they are naturally, in order to have a deep understanding.
Using of open ended questions would make consumers choose their own words, and enable the manufacturer to understand the consumers first impression better.
Physical barriers
immune system
body temp
Answer:
not sure but I think the correct answer is c