In the 1920s, Psychologist Karl Lashley

In the 1920s, psychologist Karl Lashley:

A) began a longitudinal study on the memory of high school students for the words and phrases they had learned in Spanish class.
B) began the first systematic study of forgetting using nonsense syllables.
C) measured the duration of visual sensory memory.
D) began searching for the memory trace, or engram, which refers to the hypothetical brain changes associated with a particular stored memory.