A study of 900 working women showed that their feelings changed throughout the day. The line graph shows 15 different times in a day and the average level of happiness for the women at each time. Based on the information given by the graph, represent the set using the Average Level of Happiness at Different Times of Day roster method. (x|x is a time of the day when 1< average level of happiness < 2} noon 10 11 12 13 19 20 21 Time of Day Choose the correct answer below. O A. (9, 15, 16) O B. (11} O C. (11, 15} O D. (9, 15}

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