Final answer:
The question asked does not correlate with the provided probability problem and concerns business understanding of cash back rewards which vary by bank and card offerings, not typically a set percentage of the purchase.
Step-by-step explanation:
The question about how much cash back a customer can get back with their debit card purchase doesn't directly relate to the probability problem provided as a reference.
Cash back options offered by debit cards vary by bank, store, and specific card offerings, and are not usually based on a percentage of the purchase like cash back credit card rewards.
As such, options A) 10% B) 1% C) 5% D) 20% do not necessarily apply to debit card transactions, and the question seems to be more about understanding cash back rewards in a general business sense rather than solving a mathematical probability problem.