After hearing a friend's telephone number for the first time, Harold was immediately able to recite all seven digits of the phone number in perfect order.Harold most likely used his _____ to recite these digits.

A) procedural memory
B) sensory memory
C) long-term memory
D) short-term memory

Harold was able to immediately recite the telephone number after hearing it, indicating that he used his short-term memory. Short-term memory is the ability to hold a limited amount of information in one's mind for a short period of time, usually up to about 20-30 seconds. In this case, Harold likely held the seven digits in his short-term memory long enough to recite them back in order.