I think the correct answer would be insulin. Considerable debate occurs regarding the use of anabolic steroid drugs like insulin in professional athletes and bodybuilders. Insulin is known to be used by athletes in the past as it is helpful and important in building muscle tissues. The use of it was banned in 1988 by the International Olympic Committee.
The correct answer is the oral stage of psychosexual development.
According to Freud's theory of psychosexual development, the oral stage of development is the first stage of psychosexual development which is seen in infants (0- 12 months of age approximately). During this stage of development, the focus is the mouth, and infants derive pleasure and satisfaction by putting things in their mouth. When Cali is scared, she derives comfort from sucking her thumb.