Mary's credit card account number contains 16 digits. Instead of remembering the individual digits, she remembers four sets that each contains four digits. Mary has used to improve storage in short-term memory Group of answer choices splitting a mnemonic chunking the recency effect

Mary has used chunking to improve storage in short-term memory.

Explanation:

Chunking is a common strategy for better memorization of information. It consists of grouping pieces of information into chunks, or larger pieces, which helps increase the amount of information one can recall. That is what we often do with phone numbers or, as is the case with Mary, credit card numbers. It is easier to remember the chunks of numbers than to try to recall the whole thing or each number separately.

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your answer is "graduates" hope this