King Frederick William of Prussia failed in his attempts to create an army of giants because of all the following reasons except one. Select the exception.
◦ Human life spans are too long.
◦ Children of the crosses were actually shorter than their parents.
◦ Size in humans is too complex a trait.
◦ There was too much resistance to his program because of ethical considerations.
◦ There are no exceptions. All of these reasons are correct.