What is it called when jazz musicians change or add chords to an existing chord progression?

A mosque is used in the Jewish religion

Indicate whether the statement is true or false

Which best describes the use of sonata form in the nineteenth century?

a) it declined in popularity and its use gradually ceased completely b) romantic composers generally preferred to use sonata form in a strict manner c) it was sometimes used, but only by conservative composers d) it frequently was used but generally was varied or disguised by composers