Question

If \( f(x) = \ln \left( \frac{x^2 + e}{x^2 + 1} \right) \), then the range of \( f(x) \) is:

• A. \( (0, 1) \)
• B. \( (0, 1] \)
• C. \( [0, 1] \)
• D. \( \{0, 1\} \)

Hint:

When working with logarithmic functions, consider the behavior of the argument and the natural logarithm's range.