What is the system of notation that specifies how a piece is to be played on the guqin?

One reason that both Protestants and Catholics opposed the heliocentric theory was that it

a. had no empirical basis. b. contradicted Scripture. c. was introduced to Europe by Muslim astronomers. d. All these answers are correct.

In a minstrel show, the interlocutor is:

a. the black-faced vocalist of love ballads b. the emcee (master of ceremonies) who also serves as the "straight-man" for the comedic endmen c. the baggy-pants comedian who performs between vocal numbers d. the animal trainer of vaudeville shows