What characterizes a tenancy at will?

A tenancy at will is characterized by its flexibility and the nature of the agreement between the landlord and tenant. Specifically, it often arises when a tenant occupies a property with the landlord's consent but without a formal lease agreement specifying a fixed term.

In the case of option B, the mention of a verbal agreement that can be terminated with a 30-day notice encapsulates the essence of a tenancy at will. This type of tenancy allows either party to terminate the arrangement with proper notice, typically adhering to the state’s laws regarding such notice periods, which in Massachusetts is commonly 30 days.

This flexibility contrasts with a fixed-term lease, where specific dates define the duration of the tenancy and written agreements may govern longer-term leases, making termination more complicated. In a tenancy at will, the lack of formal documentation simplifies the arrangement but relies heavily on the mutual understanding between the parties involved.