k is a positive number. If k is twice its reciprocal, and j is twice k, then jk =

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Source: Magoosh

k is a positive number. If k is twice its reciprocal, and j is twice k, then jk =

A. \(2\sqrt{2}\)
B. \(4\)
C. \(4\sqrt{2}\)
D. \(8\)
E. \(8\sqrt{2}\)

The OA is B