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Five Reasons Why Being Kind Makes You Feel Good - According to Science

What is the authors' main purpose of the text?

(1 point)
Responses

to encourage readers to be kinder to one another
to encourage readers to be kinder to one another

to emphasize the disadvantages of only being concerned with yourself
to emphasize the disadvantages of only being concerned with yourself

to explore the different explanations for why being kind makes us happy
to explore the different explanations for why being kind makes us happy

to suggest that humans are kind for largely selfish reasons