Making yourself believe positive things about yourself will you give you the courage to make it through whatever the situation may be.
B. Is the correct answer, however if this happens over a long period of time, it will develop into C.
Genetically modifying food can lead to things like Cancer, Diabetes, and other diseases. EU has banned it for the most part because of it's unhealthy nature, and tendency to cause problems in the body. They aren't "frankenstein foods", just foods that have been modified to help production and efficiency.