Answer:
b
Explanation:
The answer to your question is B
A ballad is a sad song that tells a story.
In this case it is a ballad opera.
Yes it would be okay. You are only using it for 2 things. Not everything.
C
A drawing from a secondary source,e.g. books, photos, adverts, etc.,
This is false.
These stones are actually called keystones found at the apex of an arch.