以下哪个是增强技术遵循的准则?

A.Restricting and hindering dislocation motion renders a material harder and stronger.

B.Restricting and hindering dislocation motion decreases the hardness of a material.

C.Restricting and hindering dislocation motion are not related to the hardness of a material.

D.Restricting and hindering dislocation motion are not related to the toughness of a material.

正确答案：Restricting and hindering dislocation motion renders a material harder and stronger.