Freud is talking about the id.
The id is defined as the part of the mind and personality that is unconscious to us. It is the primitive part of our mind that houses our sexual and aggressive urges. Freud claimed that the id is something humans possess from birth itself. The id is only concerned about satisfying our hunger, thirst and the need for comfort.
I believe the answer is: increasing generalizability
Generalizability refers to the extend that a conclusion of a research could be applicable to different people. As generalizability goes higher, The reliability of the measurement would be increased. and it could easily be replicable even if the test subjects are drastically altered.
D. Senate
The senate has 300 Patrician
It was ratified after the Civil war