The correct answer is D. None of the above.
A hoe is a hand tool used for digging, weeding, and other gardening tasks. It has a long, narrow blade that is attached to a handle. A shovel is a hand tool used for digging, lifting, and moving loose material. It has a broad, flat blade that is attached to a handle. A dragline is a type of excavator that uses a cable to drag a bucket along the ground. It is used for excavating large amounts of material, such as dirt or sand.
For excavating utility trenches with precise control of depth, a backhoe or a trencher is used. A backhoe is a type of excavator that has a bucket on the end of a long arm. The bucket can be used to dig up dirt and move it to a different location. A trencher is a machine that is used to dig long, narrow trenches. It has a rotating blade that cuts through the ground.
Backhoes and trenchers are both equipped with depth gauges that allow the operator to control the depth of the excavation. This is important for excavating utility trenches, as the trenches must be dug to a specific depth in order to accommodate the utilities.