Which statement best represents current evidence on the durability of long-term storage?

کون سا بیان طویل مدتی اسٹوریج کی پائیداری پر موجودہ ثبوت کی بہترین نمائندگی کرتا ہے؟

All forgetting involves breakdowns in retrieval

LTM is like a barrel of marbles in which none of the marbles ever leak out

There is no convincing evidence that all one’s memories are stored away permanently

All long-term memory gradually decay at a constant rate

The statement that best represents current evidence on the durability of long-term storage is: "There is no convincing evidence that all one’s memories are stored away permanently."
This statement reflects the understanding that while some memories may be retained for a long time, others may be subject to decay, interference, or other factors that can affect their durability over time.