Six Large Historical Earthquakes Occurred on the Parkfield Segment of the San

Six large historical earthquakes occurred on the Parkfield segment of the San Andreas fault prior to 2004, with the last one of these occurring in 1966. The graph to the right plots the actual versus predicted dates of all the earthquakes on the Parkfield segment and shows:

A) all the earthquakes before 1966 occurred exactly when predicted
B) the 2004 earthquake occurred earlier than predicted
C) the 2004 earthquake occurred later than predicted
D) graphs like this are a precise way to predict earthquakes
E) both c and d