The answer is C), playing a simple scale.
The sentence should be this: She demonstrates how to tune her instrument and she also played the simple scale.
Answer:
C. Whites built their wealth by oppressing other groups of people.
Answer:
Banquo is skeptical of the Witches' intentions and remains unconvinced of the Witches' prophecy. ... While the Witches have prophesied great futures for both Macbeth and Banquo, Banquo is less inspired and intrigued than Macbeth and would rather leave the matter safely alone.