Answer:
To measure motion, you must be able to compare it to a reference point, or a non moving point.
Answer:
Yes, you are correct! C,D and E are correct
The slopes show that sucrose gradient affects change in weight.
The slopes will be different because higher gradient concentration of sucrose will result in the higher amount of water moved. This means the higher sucrose gradient concentration, the more change in weight of the water.
I believe its C because it seems the most reasonable.