Wagnerian leitmotives are distinguished from the reminiscence motives used by Verdi and Bizet in that

A. leitmotives connote dramatic and character development through their gradual musical transformation and combination with other leitmotives, while reminiscence motives tend to maintain a single, static meaning.
B. leitmotives are always first played by the orchestra without words, while reminiscence motives appear first in the vocal part.
C. leitmotives are usually diatonic, while reminiscence motives are usually chromatic.
D. leitmotives are never transposed, while reminiscence motives may appear in any key.
E. leitmotives refer to abstract ideas rather than concrete things, while reminiscence motives refer to concrete characters or objects.