A statue carved free of any background or block is called a __________

The introduction of Western harmony in the 1920’s and 1930’s to African polyphony

brought about an a cappella style known as _______.

Fill in the blank(s) with the appropriate word(s).

The dialectical materialism put forth by Karl Marx and Friedrich Engels owes a debt to which earlier philosopher?

a) Søren Kierkegaard b) Immanuel Kant c) René Descartes d) George Friedrich Hegel