A piece of yam weighing 1.0 gm was put into some salt solution. After 3 hours, it was removed and weighed.
The recorded weight was 1.2gms. This simple experiment demonstrates that the

A. salt solution is more concentrated than the cell sap of the yam.
B. cell sap of the yam is more concentrated than the salt - solution  
C. salt solution has the same concentration as the cell sap of the yam.
D. the yam lost some water molecules to the salt solution.

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Correct Answer: B