Bob Rented a Lawn Mower from Scott Rentals

Bob rented a lawn mower from Scott Rentals.The lawn mower wheel was loose when Bob picked up the mower.When he began to use it,the wheel fell off,causing the mower to tip over onto his foot.Under what theory can Bob hold Scott liable for his injuries?

A) Breach of warranty of merchantability.
B) Strict liability in tort for a defective condition.
C) Both of the above.
D) Neither theory is applicable to leases.