Mathematics, 15.12.2019 06:31 pippyysanchezz

Research was done to study the facial expressions of people, since facial expression clearly shows the emotional state of a person. researchers found that people who smiled a lot lived longer than those who didn't smile much.

which statement can be inferred from the passage?

smiling prolongs human life.

smiling is associated with human longevity.

smiling decreases a person's life span.

there is no link between smiling and human longevity.

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