Which will best complete the diagram to illustrate the law?
A
adding in the boxes an arrow that points in both directions between cap q sub h and cap q sub cB
adding in the boxes an arrow that points from cap q sub h to cap q sub cC
adding in the boxes an arrow that points from cap q sub c to cap q sub hD
adding in each box an arrow that points upward from cap q sub h and from cap q sub c