What benefit does the expansion of a grader's frame provide during operation?

The expansion of a grader's frame significantly enhances maneuverability and stability on uneven terrain. A wider frame allows the grader to distribute its weight more evenly, which improves balance and traction. This is particularly important when operating on sloped or irregular surfaces, where maintaining control is critical for effective grading.

Additionally, the broader frame increases the machine's footprint, which can help prevent it from sinking into softer ground or becoming unstable on inclines. This design feature enables operators to perform more precise grading while reducing the risk of accidents, ensuring a safer and more efficient operation in varied conditions.

The other options relate to qualities that are not directly influenced by the frame's expansion. For instance, while better traction may be a factor, it is the broader weight distribution that primarily aids stability and maneuverability. Grading speeds and the capability to achieve greater depth in grading are influenced by other design elements and operational techniques, rather than the frame size itself.