To Improve a Variable Skill Such as Shooting a Basketball

To improve a variable skill such as shooting a basketball from different places on the court,the data suggest that the best way to practice is

A) shoot all practice shots from one location,such as the foul line
B) shoot all practice shots from a small number of different locations
C) shoot from many different locations,and change locations after every practice shot
D) shoot from many different locations,but shoot a group of shots from one location before switching to another location