Which of the following is a characteristic of resilience?
having more highly developed learned emotions than primary ones
being more introverted than extroverted
being able to live according to your own values
staying happy even when facing serious problems
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D. staying happy even when facing serious problems

Explanation:

resilience means to have the capacity to recover quickly from situations; being tough. So being able to stay happy when facing issues means you have resilience.

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answer(b) keep oxygenated and deoxygenated blood separate;