When working in a trench that has water accumulation, which of the following precautions should take place to ensure the safety of the employees?

Remove or minimize all surface obstacles at the worksite that may create a hazard,Wear warning vests or other reflective or high-visibility garments that you provide when they are exposed to vehicular traffic,Wear or use prescribed protective gear and equipment correctly,Operate equipment only if they have been trained properly in its use and alerted to its potential hazards, andFollow safe work practices.

2cool and cold temperature unless its an ever green tree 

Hope this shshf