Refer to Figure 2-9. What would you say about the relationship between coffee and hours without sleep? a) The less coffee a person drinks per day, the more time he can go without sleep. b) There is no relationship between how much coffee per day a person drinks and how long they can go without sleep. c} The more coffee a person drinks per day, the longer he can go without sleep. d) The relationship between cups of coffee per day and time without sleep is too unpredictable to consider