During the client's annual physical examination, the significant other states that the client will ...

During the client's annual physical examination, the significant other states that the client will just stop in the middle of a sentence and stare off into space for about 15 seconds fluttering his eyes.
 
  When he stops staring, he just continues what he was saying. I asked him what he was thinking when he was staring and he doesn't remember anything about this episode. It has happened about a dozen times in the last couple of months. What is happening with him? The nurse recognizes this behavior as characteristic of:
  a. a simple partial seizure. c. an atonic seizure.
  b. a complex partial seizure. d. an absence seizure.