The recall of sad experiences is often primed by feelings of sadness. this most clearly illustrates

mood-congruent memory        

Explanation:

Mood-congruent memory: The term mood-congruent memory is defined as the time or point when an individual stores a specific memory, he or she doesn't only store that specific event, but also store the mood while he or she was storing the memory. According to this context, when a person feels happy he or she recalls memories of happy events and recalls negative or sad events when the person feels depressed.

In the question above, the recall of sad experiences is often primed by feelings of sadness. This most clearly illustrates the mood-congruent memory.

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