Three of the Following Are Examples of Mnemonics

Three of the following are examples of mnemonics. Which one is not a mnemonic?

A) To learn the letters identifying the spaces on the treble clef (F A C E) , Annabelle simply remembers the word face.
B) To learn how to drive a car with a standard transmission, Bart practices the various parts of the task (e.g., steering, shifting, and braking) separately.
C) To learn that the Spanish word pájaro means "bird," Corey pictures a bird wearing pajamas.
D) To learn that the Spanish word navidad means "Christmas," Dorene thinks of the word nativity.