Jessie orders boxes of 12 muffins for $8 each. The delivery cost is $9 regardless of the number of boxes ordered. Jessie has only $75 to spend. If b is the number of boxes of muffins ordered, then the cost per muffin, C, can be modeled as a function of b. Select the statement that correctly describes the domain of the function. A The domain is the set of all integers 1≤b≤8. B The domain is the set of all integers 1≤b≤9. C The domain is the set of all real numbers 1≤b≤8. D The domain is the set of all real numbers 1≤b≤9.