B. Roots
Roots are the smallest meaningful parts of words. For example the root word of aquamarine would be Aqua, which means water. So the root word can also give you a hint on the meaning of the word.
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Answer:
A. How much the audience already knows about an event.
Explanation:
Here the answer
Every sitcom episode has a main plot (story A), as well as one or two subplots (stories B and C).” There are three main acts, divided by two commercial breaks (in most American TV), with 3-5 scenes per act.