What typically happens to memory within 100 hours after a critical event?

The correct answer reflects the phenomenon of memory consolidation, which is often observed in the aftermath of critical or traumatic events. Within the first 100 hours following such an event, it is common for the initial memories to become more robust as the brain processes and organizes the information. This consolidation may lead to an increase in memory retention, allowing for a clearer and more detailed recollection of the event over time.

Additionally, during this period, the emotional and contextual aspects of the event may enhance memory encoding, making the memories more vivid and easier to recall. This is particularly relevant for significant or traumatic experiences, as they tend to be encoded with greater intensity due to their emotional impact.

In contrast, options that suggest memory decreases or remains unchanged do not account for the active memory consolidation processes that occur shortly after a critical event. The idea that memory becomes fragmented is also inconsistent with the general understanding of memory development in the aftermath of significant experiences. Instead of fragmentation, individuals typically see improved clarity and structure in their memories as they adapt to and understand the event better.