The table and graph below show the distances traveled by two different objects. A table has title Object A and has 2 columns and 5 rows. The column heading is Time in hours and distance in miles. The first column has numbers 1, 2, 3, 4 and the second column has numbers 12, 26, 40, 48. A distance versus time graph is titled Object B and it is a straight line passing through the points 0, 0 and 5, 50 What is the difference between the motions of the two objects? a Object A's speed increases steadily but Object B's speed decreases steadily. b The speed of Object A is constant but Object B's speed increases steadily. c The speed of Object A changes but Object B travels at a constant speed. d Object A travels at a constant speed but Object B travels at an increasing speed.