\(\mathop {\lim }\limits_{x \to {1^ + }} \frac{{{x...

Câu hỏi: \(\mathop {\lim }\limits_{x \to {1^ + }} \frac{{{x^2} - x + 1}}{{{x^2} - 1}}\) bằng:

A. \( - \infty \)

B. -1

C. 1

D. \( + \infty \)