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This should be B, it is a compound-complex sentence.
The formulas were part of the performance to allow the audience a moment to breathe while the singer could think about the next part of the story. These formulas for different aspects of culture such as greeting guests, eating meals, etc.
D. All of these things.
if the note cards are for citations or sources, then each element is needed.
For example: when citing a physical copy of a book (in MLA format at least) it’s important you include all relevant information. It would look like this: Author last name, First name. Title of Book/Magazine. Publisher, Publication Year. Print.
