One end of a wire is fastened to a fixed point. At the opposite end, a tensile force $F$ is applied, making the wire extend. The graph labels this stage as line OSP. The force $F$ is then reduced gradually to zero, after which the wire contracts. The graph labels this stage as line PQ. Which area on the graph represents the work done by the wire during contraction?
- AOSTO
- BOSPRO
- CQPRQ
- DOSPQO