A farm with a large acreage is sold with a covenant that the buyer and the buyer's heirs must purchase all animal feed from the seller for a fair market price. When the buyer's heir stops purchasing from the seller, which defense most likely prevents the burden from running to the heir?

• A. The covenant does touch and concern the land.
• B. The covenant is an unduly restrictive restraint.
• C. There is horizontal privity between the original promisor and promisee.
• D. The covenant runs with the land regardless of touch and concern.

Answer: (B)