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My homework key says that a is the correct answer, but I'm unsure why. How does the addition of "three props" change anything? In other words, how do I recognize when to apply this rule: "Use a colon after an independent clause to introduce a list ofparticulars, an appositive, an amplification, or an illustrative quotation".
Which of the following statements uses colons correctly?
a. Your dedicated whittler requires three props: a knife, a piece of wood, and a back porch.
b. Your dedicated whittler requires: a knife, a piece of wood, and a back porch.