Concept:A third class lever has the effort applied between the fulcrum and the load.Explanation:In sugar tongs, the fulcrum is at the hinge, the sugar cube is the load at the tips, and the squeezing effort is applied between the hinge and the tips.Therefore, the effort lies between the fulcrum and the load.A wheelbarrow is a second class lever, while scissors and a crowbar are first class levers.Answer:B. sugar tongs.