You are a new safety manager for an excavation/utility contracting company The project is to extend public sewer line service to a new subdivision residential area. New homes are being buit now. You will extend the sewer lines beneath a two lane rural state highway The plan is to use the company Caterpillar 416D backhoe and a Caterpillar 315C. Excavator to trench the extension lines, hoist the concrete pipe sections into the trench, and connect to the previous pipe section. The trench will have to be eight feet deep, it will run parallel to a rural county roed and then cross the state highway near the intersection. Along the county road you will not run into other underground utilities as the water line is on the opposite side of the rural road. The pipe is 36 in diameter of RCP or reinforced concrete pipe, Class III. The trench bottom will be compacted and bodding placed down before hoisting the pipe sections (8') into the trench and placed at the end of the previous section. The pipe is B wall thickness and weighs 524 bs per linear foot. Once 32 feet of pipe is set, the trench will be covered using a Case 850 LGP dozer. When piee sections are to be hoisted into the trench for placement what would be your rocommendations Select all that apply Workers cannot bo inside the trench box nor beneath the load Workers can be in the box but not beneath the load Use taglines to help control Have a ground guide using signals and radio communication to the operator to help with placement Utilie a second trench box ahead of the box where work is conducted to protect workers behind box struts in case load is dropped or fails