Which statement about memory updating in AI agents is true?

• A. It resets memory after every action
• B. It stores only the latest observation
• C. It ignores new observations
• D. It appends results of observations to refine future reasoning.

Answer: (D)

Memory updating means the agent builds on what it has seen by storing new observations and results to inform future decisions. The statement that best fits is that it appends results of observations to refine future reasoning. This additive approach lets the agent maintain context across steps, recognize patterns, recall past outcomes, and adjust plans as new information arrives. If memory were reset after each action, or if only the latest observation were kept, useful history would be lost and long-term reasoning would suffer. Ignoring new observations makes the agent static and unable to adapt to changes. In real systems memory is often stored in a growing log or vector store and may be summarized or pruned, but the core idea is to continuously add new information to improve subsequent reasoning.