Transitional sections that occur between statements of the subject in a fugue are called a. episodes. b. toccatas. c. countersubjects. d. expositions.

The correct answer is (a). Episodes are transitional sections that occur between statements of the subject in a fugue. It is generally fundamental to the musical experience of fugue that the subject disappears and later reappears, but that doesn’t mean that fugues have to have episodes. Some fugues have no episodes, which means that subject is always present, and some are mostly consisted from episodes.