Question 8.

The “unconscious” burst the shell of conventional language, coined as it had been to embody the fleeting ideas and the shifting conceptions of several generations until, finally, it became fixed and defined in specialized terms within the realm of medical psychology and Freudian psychoanalysis.

In the passage, the author has clearly outlined the importance of linguistic developments in helping the knowledge of the field grow. Since the option is not extreme in certainty ('may' not have happened), Option A can be inferred.

Significantly, most if not all of these practices (for example, hypnotism in surgery or psychological magnetism) originated in the waning years of the eighteenth century and during the early decades of the nineteenth century, as did some of the disciplines (such as psychology and psychical research). The majority of topics too were either new or assumed hitherto unknown colors. Thus, before 1790, few if any spoke, in medical terms, of the affinity between creative genius and the hallucinations of the insane . . .

From the above excerpt, we can infer that the affinity between genius and insanity was not looked into before the 18th century.

At the same time, once coined, powerful new ideas attracted to themselves a whole host of seemingly unrelated issues, practices, and experiences, creating a peculiar network of preoccupations that as a group had not existed before.

The above excerpt and the examples the author provides after this excerpt can help us infer that as the knowledge of the mind grew, unrelated activities found a common title. Option D can be inferred.

The passage does not imply anywhere that the new conceptions were able to provide new knowledge only because some fields were established. Option C is out of the scope of the passage and cannot be inferred.