Answer:
The right answer is option B „chunking”
Explanation:
Chunking is the process in which we take separate pieces of information, named as chunks, and we group them in bigger items because this way the information given will be easier to retain, as well as we can remember more. This is because our short-term memory just allows us to keep in mind, according to various studies, between four or nine chunks of information, so for Mary will be easier to retain 5 groups of 3 letters than 15 individual letters.