What unusual vocal technique did Ellington use in "Transbluency" and "Creole Love Call?"

The following diagram shows how the three-line (A A B) and quatrain-refrain (a b c d A B) stanzas compare. Note the correspondence in the two forms between the first line A of the three-line stanza and the quatrain a b c d. Also note the correspondence between the last two lines of both forms A B

Three-line Stanza: ||: A A B :|| Quatrain-refrain Stanza: ||: a b c d A B :|| What will be an ideal response?

What style of music did Herbie Hancock turn to after becoming disillusioned with the modern modal style?

a. cool jazz b. hard bop c. jazz-rock funk d. hip-hop