The correct answer is that they 'are not valid'. If the experiment is biased, it entails that it is not objective. For a experiment, and its results, to be valid, it had to be carried out objectively and taking into account all factors.
It is possible that the results disprove a hypothesis, but to be certain it is necessary to see which was the original objective of the study, as it might also prove to some extent a hypothesis, which is probably also biased.
Statement one focuses on contacts while statement two focuses on glasses. The first statement gives a few examples of why contacts could be more beneficial than glasses (don't fog up/move with your eye). The second statement does not go into details about how glasses could be more helpful, but instead describes different types of glasses that exist.
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