Which one of the following shovel excavators is considered most efficient in loading carriers ?-A-Dipper shovelB-DraglineC-BackhoeD-Clamshell-C-Backhoe

C Backhoe The correct answer is a backhoe. A backhoe can function as a buiidozer for backfilling. It is most efficient in loading carriers. It is an excellent excavator for digging loosely packed moist clay or sandy clay.