When numerators are equal, the fraction with the smallest denominator is the largest.<br><br>
&bull; All numerators are 1.<br>
&bull; Compare denominators: 2, 3, 4, 5. Smallest denominator = 2.<br>
&bull; \( \frac{1}{2} \) is the largest fraction.<br><br>
Final Answer: A: \( \frac{1}{2} \)