15. During their science class, Jessa was assigned to discuss about distance-time
graphs. In one of her graphs, Jessa shows a graph with a diagonal line that slopes
upward to the right. She explained that the graph means that an object is moving
at a constant speed. Do you think her explanation is correct?
A. No, the distance-time graph should show a horizontal straight line going to
the right
B. No, a diagonal line that slopes upward to the right in a distance-time graph
means that the speed is increasing,
C. Yes, the motion of objects plotted in a distance-time graph has similar
interpretation if plotted in a speed-time graph.
D. Yes, a diagonal line that slopes upward to the right means that distance is
increasing constantly with time, thus an object is moving in a steady speed

please help me i need now ​