You find that you are bored with a reading assignment after less than ten minutes, and you start ...

You find that you are bored with a reading assignment after less than ten minutes, and you start daydreaming. Which of the following techniques is likely to improve your concentration?
 
  a. Stop reading immediately and return to the material later when you are more alert.
  b. Take a short break and have a soft drink or a cup of coffee.
  c. Simply find another place to read. A change in your environment will do the trick.
  d. Become more actively involved in the reading material (for example, hold a conversation with the author, predict questions in the margin, or take notes).