10. Your favorite bicycle daily rental store has just introduced a new Customer Relationship Management system and asked you, one of their most loyal members, to test it.
The implemented features are as follows:
- Anyone can rent a bicycle, but members receive a 20% discount
- However, if the return deadline is missed, the discount is no longer available
- After 15 rentals, members get a gift: a T-Shirt
Decision table describing the implemented features looks as follows:

Based ONLY on the feature description of the Customer Relationship Management system, which of the above rules describes an impossible situation?