When numerators are equal, the fraction with the smallest denominator is the largest.<br><br>
&bull; All numerators are 1.<br>
&bull; Compare denominators: 5, 8, 9, 3. Smallest denominator = 3.<br>
&bull; \( \frac{1}{3} \) is the largest fraction.<br><br>
Final Answer: D: \( \frac{1}{3} \)