By imagining where she was when she last walked in the door, Marla retraced her steps to find her keys. This is an example of a __________ dependent memory.

Marla remembers where she was when she last had her keys by mentally returning to that place. Remembering is often easier when the surroundings at recall match the surroundings where the memory was formed; this is context-dependent memory. So the correct choice is context.

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