A spring balance A and a beam balance B are used to weigh an object at different points on Earth. It will be observed that (a) The readings of A and B will be different at different points of the Earth. (b) The readings of A will be the same but the readings of B will be different at different places. (c) Both A and B will have the same reading at all points on the Earth. (d) The readings of A will be different but those of B will be the same at different points on the Earth.