The characteristics of the common law tenancy at will leasehold interest are best described by which of the following statements?

A. An agreement whereby the tenant has a tenancy for a duration of the parties' discretion and which will automatically terminate when either the tenant or the landlord decide to end the tenancy.

B. An agreement whereby the tenant has a tenancy for a set period of time and automatically terminates at the conclusion of the period.

C. An agreement whereby the tenant has a tenancy for a set period of time that is more than a year and automatically terminates at the conclusion of the period.

D. An agreement whereby the tenant has a tenancy for a set period of time that automatically renews at the conclusion of the period, and that terminates upon written notice by either party given in advance by a period of equal length.