The Turn of the Century Psychologist McDougall Found That People

The turn of the century psychologist McDougall found that people presented a list of 12 letters, shown for a fraction of a second, could recall

A) up to 12 letters, as long as the letters were presented in a single row.
B) most of the letters, if they were presented in rows of no more than three letters each.
C) six or seven letters, as long as they were presented in a row.
D) four or five letters in a single fixation.