A) \[\frac{{{a}^{2}}-{{b}^{2}}}{{{a}^{2}}+{{b}^{2}}}\]
B) \[\frac{a+b}{a-b}\]
C) \[\frac{{{a}^{2}}+{{b}^{2}}}{{{a}^{2}}-{{b}^{2}}}\]
D) \[\frac{a-b}{{{a}^{2}}-{{b}^{2}}}\]
E) None of these
Correct Answer: C
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