George Miller's (1956) Classic Article, on the Magical Number Seven

George Miller's (1956) classic article, on the magical number seven, introduced the concept of a chunk. According to Miller's terminology, a chunk

A) should be measured in terms of the number of items that can be spoken within a 30-second interval.
B) is the basic unit in short-term memory.
C) is the portion of the brain in which short-term memories are stored.
D) is the maximum limit of your short-term memory.