, 2024

Meera walked in the park. She walked half of the total time at a speed of $2$ km/h. She then walked half of the total distance at a speed of $3$ km/h. Finally, she completed the remainder of the walk at a speed of $4$ km/h. For what fraction of the total time did she walk at a speed of $4$ km/h?

(A) $\dfrac{1}{14}$ (B) $\dfrac{1}{12}$ (C) $\dfrac{1}{7}$ (D) $\dfrac{1}{5}$ (E) $\dfrac{1}{4}$