Studies on infant long-term memory have shown that infants can remember if the researchers:

A) use situations that are different from real life.
B) do not let the baby move during the memory event.
C) use highly emotional events.
D) use special measures to aid memory retrieval,such as reminder sessions.

Studies have shown that infants' long-term memory can be improved if special measures are taken to aid memory retrieval, such as reminder sessions. This suggests that memory in infants is not just based on the initial experience, but also on the ability to retrieve and retrieve that memory over time. The other choices, such as using situations that are different from real life or not allowing the baby to move, may affect the effectiveness of memory formation, but they do not necessarily affect long-term memory. Similarly, using emotional events may capture attention and increase the salience of the event, but it does not guarantee long-term memory retention.