Which unities must be present in a joint tenancy?

In a joint tenancy, the specific unities that must be present are possession, interest, time, and title. This means that all joint tenants must have equal rights to possess the property (possession), each tenant must have an equal and undivided interest in the property (interest), all tenants must acquire their interests at the same time (time), and they must all hold the property under the same legal title (title). This creates a right of survivorship, meaning that when one tenant passes away, their interest automatically transfers to the surviving tenants rather than to the deceased's heirs.

While the other answer choices mention some elements associated with joint tenancy, they do not include all four necessary unities. For example, simply possessing the property and holding the same title is insufficient without the elements of equal interest and time of acquisition. Therefore, recognizing the complete set of unities is crucial for understanding how joint tenancy operates and ensures that all tenants have equal stakes in the property, contributing to the integrity and mutual benefit of the ownership arrangement.