Ace, Bud, and Chet Leased an Apartment from Stan Slumlord

Ace, Bud, and Chet leased an apartment from Stan Slumlord. They signed a lease that established a 12-month rental period at $400 per month as rent. Two months after the three tenants moved into the apartment, Ace and Bud moved out. Ace and Bud each moved to a different-and distant-state. Slumlord insists that Chet is responsible for the entire $400 per month rent. Is Slumlord correct?

A) Slumlord is incorrect. Under these facts, each tenant is responsible for one-third of the rent payment as an implied term of the lease agreement.
B) Slumlord is correct. The tenants are jointly and severally liable for the rent payments under the lease.
C) Slumlord is incorrect. This is a tenancy at sufferance, meaning that any tenant may vacate without incurring liability for further rent payments.
D) Slumlord is correct, if the lease was executed in a state that has adopted the Uniform Residential Landlord- and Tenant Act.