After conducting a survey of all his classmates, Luke discovers that the amount of money everyone spends buying snacks each month has a mean of $38. What does the mean say about the amount his classmates spend on snacks? A: The majority of his classmates spend $38 per month buying snacks.B: Half of his classmates spend more than $38 per month buying snacksC: Half of his classmates spend exactly $38 per month buying snacks.D: If the amount spent on snacks per month by all his classmates is leveled, that amount would be $38.