When a Walking Person Lifts One Foot Off of the Ground,which

When a walking person lifts one foot off of the ground,which of these happens?

A) The body leans so that the center of gravity shifts over the foot that is lifted off of the ground.
B) The body only accelerates forward,so the center of gravity remains directy between the two feet.
C) The body accelerates forward,but the center of gravity shifts over the foot that is lifted off the ground.
D) The body leans so that the center of gravity shifts over the foot that is on the ground.
E) The center of mass is left behind by the acceleration of the body,so the body must lean forward to compensate.