A wire is stretched by a tensile force, and its deformation remains elastic. What does elastic deformation mean?
- AThe extension of the wire is proportional to the tensile force.
- BThe extension of the wire is not proportional to the tensile force.
- CWhen the tensile force is removed, the wire does not return to its original length.
- DWhen the tensile force is removed, the wire returns to its original length.