1. Written especially for Judy Holliday, "Bells Are Ringing," which opened at the Shubert Theater in 1956, included among its creative team these talented individuals:
o Agnes de Mille, Richard Rodgers, and Oscar Hammerstein
o Leonard Bernstein, Stephen Sondheim, and Hal Prince
o Alan Jay Lerner and Frederick Loewe
o Jerome Robbins, Betty Comden, and Adolph Green

Jerome Robbins, Betty Comden, and Adolph Green.

Explanation:

In the original Broadway production, Jerome Robbins directed and choreographed it while Betty Comden and Adolph Green wrote the book and lyrics for the musical.

it seems to me that yes they solo on the chord changes.  coltrane for sure solos on the chord changes. instead of changing scales, they use a different method over the chord changes. this melody is very  unique but may often times even be considered simple, which is quite common in this modal  type. for example, there are changes from the key of minor to major in this piece, which makes it  unique in its own way.