Which of the following must a life tenant understand to have testamentary capacity?

A life tenant must understand the nature and extent of their property to have testamentary capacity. Testamentary capacity refers to the legal ability to make a valid will and is crucial for ensuring that the individual's wishes regarding the distribution of their property after death are clearly reflected. Understanding the nature of their property includes knowing what assets they own, their value, and how those assets might be distributed upon their passing. This knowledge is foundational for making informed decisions about bequests and ensuring the will accurately represents their intentions.

The other options, while they may involve considerations related to overall property management and personal circumstances, do not directly pertain to the essential understanding required for testamentary capacity. For example, opinions of friends and family might inform decisions but do not constitute legal capacity. Similarly, social responsibilities and legal intricacies are valuable but secondary to the fundamental requirement of understanding the property itself in the context of creating a will. So, it’s the clear grasp of property details that directly impacts testamentary capacity.