Answer: (A) short-term.
Step-by-step explanation:
Short-term memory is the ability of remembering a little information for a short time in a readily available state.
Remembering a phone number that has just been read, such as in Mary´s case, is the perfect example of applying short-term memory.
In Atkinson and Shiffrin theory (1971), withouth rehearsal or active maintenance, short-term memory´s duration is between 15 and 30 seconds.