One of the most widely cited articles in psychology is George Miller's (1956) article on the size of short-term memory. According to your text, this article was important in cognitive psychology becausea. it clearly established the rigid limits of short-term memory's size. b. it demonstrated that short-term memory was distinctly different from long-term memory. c. it focused on a cognitive process—mentally converting the stimulus—at a time when most psychologists focused on people's external behavior. d. it showed that the key to the limits of short-term memory was the amount of time required to pronounce the stimuli.

C. It focused on a cognitive process—mentally converting the stimulus—at a time when most psychologists focused on people's external behavior.

Explanation:George A. Miller was a psycholigist working in Harvard university,he stated a law sometimes called the Miller Law,where he stated that the average human memory can be able to hold in a short-term memory of 7 ± 2 number of data,this is one of the most sites psychological theories.

George A. Miller(1956) focused his work on the cognitive process making it unique and special compared to other psycholigist who focused on external Behaviors.

i honestly speaking this is too long