The material __________ was imported into China from Siberia and Central Asia

Which of the following best describes this selection's approach to vertical sonority?

a) a surprisingly large number of occurrences of the tritone b) a large number of occurrences of the interval of the third c) a great reliance on intervals then considered consonant: perfect union, octave, fourth, and fifth d) a large number of seconds and sevenths

When a bass line moves predominantly by step and with a steady rhythm it is called:

A) murky bass B) basso ostinato C) passacaglia D) walking bass