Reuben leases an apartment from Maria. With Maria’s consent, Reuben assigns the lease to Nell for the last two months of the term, after which Nell exercises an option under the original lease to renew for three months. One month later, Nell moves out. Regarding the rent for the rest of the term,

a. no one is liable.

b. Reuben can be held liable.

c. only Nell is liable.

d. Maria is liable.