Inhuman policy towards disabled people under Nazi rule was linked with which thinking?

Correct answer: Thinking of racial purity

The direct answer is C: the thinking of racial purity. Nazi policy was based on a false racist hierarchy. Nazi leaders claimed that some people were biologically superior and that others, including Jews, Roma, disabled people and several persecuted groups, were undesirable or harmful to the so-called national community. This thinking helped the regime exclude, sterilise, imprison and murder people. Option C is correct because the persecution of disabled people was connected with eugenic and racial-purity ideas, not with any real scientific truth. Option A, human equality, is the opposite of Nazi racism. Option B, religious tolerance, cannot explain forced exclusion and killing. Option D, democratic rights, is also the opposite, because the Nazis destroyed democratic protections and individual rights. A useful exam cue is: Nazi racial ideology classified people as superior or inferior and made discrimination appear acceptable; it was propaganda and pseudoscience, not genuine biology.