Question

which of the following can be used to protect a trench 5 - feet or more in depth? sloping; shoring; benching; all of the above

Explanation:

In trench safety, for trenches 5 feet or deeper, sloping (angling the trench walls to prevent collapse), shoring (using supports to hold walls), and benching (creating horizontal steps) are all valid protective methods. So all these options are used for trench protection of such depth.

Answer:

D. All of the above (assuming the options are labeled A - D as Sloping, Shoring, Benching, All of the above respectively)