Nijar did an experiment to test a hypothesis that baking soda is just as effective a cleaner as bleach. He found this not to be true because more bacteria grew on surfaces cleaned with baking soda. Was there any benefit to Nijar's failed experiment? A. Yes, all the lab equipment can be used again.
B. No, Najar did not discover which product is the better cleaner.
C. No, Nijar wasted his time testing this hypothesis.
D. Yes, Nijar's findings contributed to scientific knowledge.