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D. the Olympic bicycle racer who goes faster when he is racing against a person rather than the clockSocial facilitation is when individuals are motivated to do their best because of an external stimuli or individual.Thank you for your question. Please don't hesitate to ask in Brainly your queries.
The answer to this question is:
D. the Olympic bicycle racer who goes faster when he is racing against a person rather than the clock
D. the Olympic bicycle racer who goes faster when he is racing against a person rather than the clock