The results of several studies of facial expressions in people who were born blind suggest . a. no role of genetics in the control of facial expressions b. a major role for genetics as well as environment in the control of facial expressions c. a minor role for genetics in the control of facial expressions d. no role of genetics, but a major role of environment in the control of facial expressions

b. a major role for genetics as well as environment in the control of facial expressions

Explanation:

Facial expression: The term facial expression is described as one or more than one positions or motions of the different muscles that are being present beneath an individual's facial skin. The movement of face muscles displays the emotional state of a person to observe and s often considered as a type of "nonverbal communication".

However, as nature and nurture studies have shown that genetics and environment both play a crucial and important role in an individual's development including facial expressions.

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