JAMB Biology 1980 Question 31

The filaments of Spirogyra were put into equal volumes of sugar solutions X and Y. After 5 minutes, filaments from solution X had their cell contents rounded up while those from Y were unaffected. The experiment shows that

1. A.solution X was stronger than Y
2. B.solution Y was stronger than X.
3. C.Spirogyra used up the sugar in solution X
4. D.solution X is good for stimulating sexual reproduction in Spirogyra
5. E.solution Y was less contaminated than X.