A sample distribution of hourly earnings in Paul's Cookie Factory is: Hourly Earnings $6 up to $9 $9 up to $12 $12 up to $15 Frequency 16 42 10 The limits of the class with the smallest frequency are: Select one: a. $6.00 and $9.00 b. $12.00 and up to $14.00 c. $11.75 and $14.25 d. $12.00 and up to $15.00