I would say A. Answer choice B wouldn't really make much sense with the units on each axis and how the y-axis stars from 10 and ends at 0. C wouldn't work unless they started measuring the rocket right when it reached it's zenith, or maximum height, otherwise it would be a full parabola. And as for D, I don't think that the ice would melt at a perfectly constant rate. A is the only choice that can apply to the question without any issues.
