If it was warn - hot water, i would say yes
the warm - hot water would dissolve because of the temperature
The answer to this question is A- evaporation
This would problem will be answered using the concept of momentum. Momentum is the mass times the velocity, where mass is inversely proportional to the velocity. This would mean that an object with greater mass will travel at a much lesser velocity, or vice versa.
Hence, the cart with the smaller mass will accelerate faster.