For a longer paper, there is three supporting sentences depending on the audience and purpose for writing.
What is supporting ideas?
The supporting ideas are known to be the ideas that are based on the arguments that increases the the main ideas context.
They are known to have a form of clear and direct link to the main ideas. They are also regarded as a kind of backed-up by evidence or others. Note that for for a longer paper, there is three supporting sentences depending on the audience and purpose for writing.
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