Question: Let S(n) be a statement parameterized by a positive integer n. A proof by strong induction is used to show that for any n12, S(n)

Let S(n) be a statement parameterized by a positive integer n. A proof by strong induction is used to show that for any n12, S(n) is true. The inductive step shows that for anyk15, if S(k-3) is true, then S(k+1) is true.

Which fact or set of facts must be proven in the base case of the proof?

A) S(12)

B) S(15)

C) S(12), S(13), and S(14)

D) S(12), S(13), S(14), and S(15)

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