Correctincorrect27(a) smiling hasn't always mean that a person is happy.(b) it may be for social reasons and to put people in ease(c) cheerfulness is either necessary nor sufficient for smiling(d) smiling is associated by subjective engagement.
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(a) Smiling hasn't always mean that a person is happy.
(b) It may be for social reasons and to put people in ease
(C) cheerfulness is either necessary nor sufficient for smiling
(d) Smiling is associated by subjective engagement.
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