Which of the following statements about stability is not true?
a. skilled athletes have high levels of stability.
b. stability can be learned through practice.
c. stability is genetic and cannot be improved.
d. stability requires an awareness of your center of gravity.

The correct answer is C.stability is genetic and cannot be improved. This is incorrect. Just think of when you ride a bike, it's not a genetic thing and anyone can learn it if they learn how to balance their center of gravity and their movement. It's not a genetic thing so only a few chosen people can ride a bike.

The correct answer for the fill in the blank is- C) Racism.

Racism is a system of belief ( doctrine), which indicates that the characteristics and capacities of human beings can be determined through their race ( that includes physical traits, culture and traditions, ethnicity).

Racism produces difference among races by indicating some superior and others as inferior race.

Therefore, C) is the right answer.