You Are Reading Your Textbook, and Your Eyes Are Moving

You are reading your textbook, and your eyes are moving over the page, but later you realize that you can't remember anything about the information on the page. In this phenomenon,

A) you actually process the meaning of the words subconsciously.
B) your eyes use normal saccadic movements.
C) you are actually daydreaming.
D) you are using a technique known as thought suppression.