What world music is this piece most likely influenced by?

An arrangement worked out, usually collectively, on an impromptu basis and typically played from memory was called a?

a. Theme song b. Vocalese c. Head arrangement d. Band book arrangement

Although Schoenberg and Webern both used the twelve-tone method of composing, they had little in common as to style, form, or even their interpretation of the twelve-tone principle

Indicate whether the statement is true or false