The sum of \((\frac{x-1}{x+1})\) and its reciprocal is ………………

A) \(\frac{x^2+1}{x^2-1}\)

B) \(\frac{2(x^2+1)}{x^2-1}\)

C) \(\frac{x^2-1}{x^2+1}\)

D) \(\frac{2(x^2-1)}{x^2+1}\)

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