must give reasons for any claims you make. I interviewed 100 people at the pet store. I asked them to respond either 'Yes' or 'No' to the question "To what extent do you agree that owning a pet is the best way to improve your happiness?' When I looked at the results, 70 of them had responded either 'Strongly agree','Agree', or 'Maybe', so it's clear that owning a pet definitely is the best way to improve your happiness.
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