Kathleen offers to buy Richard's prize stallion for $10,000 only if a licensed veterinarian certifies that the horse is sound for breeding. After inspecting the stallion, the veterinarian concludes that the stallion has an eye infection, but is otherwise sound for breeding. Kathleen
O does not have to buy the stallion, but must buy another horse of similar value from Richard.
O must still buy the stallion, but may pay a lower price.
O must still buy the stallion.
O does not have to buy the stallion.
