Sadie is looking to buy a new pair of running shoes. She tells the sale person that she is a marathoner and need shoes for distance. The salesperson suggests that Sadie buy a pair of Mercury running shoes. Mercury shoes are actually designed for walking rather than running. On mile 21 of her training run, the shoes start to wear through in the heel. What type of warranty has been breached? (a) no warranty was made in this situation (b) express (c) fitness for a particular purpose, or (d) merchantability