Which of the following statements is correct?

A. An assignment involves the tenant's joint use of the premises to the end of the lease term with a second tenant.

B. A sublease involves the tenant's transfer of his entire interest in the leasehold estate.

C. An assignment involves the tenant's transfer of his entire interest in the leasehold estate.

D. A sublease involves the tenant's transfer of the right to use the premises to the end of the lease term to a second tenant without the first tenant's further obligation to the landlord.