Option A: 'Torture' means 'severely inflicting pain on someone'.
Option C: 'Discovery' means 'finding out something'.
Option D: 'Following' means 'a group of people who support or admire a person or idea'.
Option E: 'Repression' means 'action of preventing or suppressing someone'.
These words are not the most suitable to the sentence in meaning and relevance.
Hence options A, C, D and E are incorrect.