In a Hypothetical World,every 50 Years People Over 6 Feet

In a hypothetical world,every 50 years people over 6 feet tall are eliminated from the population before they reproduce.Based on your knowledge of natural selection,what would you would predict about how the average height of the human population will change over time?

A) Average height will remain unchanged.
B) Average height will gradually decline.
C) Average height will rapidly decline.
D) Average height will gradually increase.
E) Average height will rapidly increase.