Which of the Following Scenarios Is Most Likely to Produce

Multiple Choice

Which of the following scenarios is most likely to produce the best retention of studied material, according to the optimal spacing theory?

A) spacing 2 study periods 1 day apart from each other, followed by a test 3 days later
B) spacing 2 study periods 1 day apart from each other, followed by a test 4 days later
C) spacing 2 study periods 2 days apart from each other, followed by a test 10 days later
D) spacing 2 study periods 4 days apart from each other, followed by a test 5 days later