The Essentials of a Mature Running Pattern Include All of the Following

The essentials of a mature running pattern include all of the following except that the

A) trunk maintains a slight backward lean throughout the stride pattern.
B) arms swing in synchronized opposition to the leg action.
C) support foot contacts the ground flat and under the center of gravity.
D) knee of support leg bends slightly after foot has made contact with ground.
E) arms stay close to the body throughout the action.